<?php
	/*
	pChart - a PHP class to build charts!
	Copyright (C) 2008 Jean-Damien POGOLOTTI
	Version  1.27d last updated on 09/30/08

	http://pchart.sourceforge.net

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 1,2,3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.

	Class initialisation :
	pChart($XSize,$YSize)
	Draw methods :
	drawBackground($R,$G,$B)
	drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B)
	drawFilledRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B,$DrawBorder=TRUE,$Alpha=100)
	drawRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
	drawFilledRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
	drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
	drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
	drawEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
	drawFilledEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
	drawLine($X1,$Y1,$X2,$Y2,$R,$G,$B,$GraphFunction=FALSE)
	drawDottedLine($X1,$Y1,$X2,$Y2,$DotSize,$R,$G,$B)
	drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B)
	drawFromPNG($FileName,$X,$Y,$Alpha=100)
	drawFromGIF($FileName,$X,$Y,$Alpha=100)
	drawFromJPG($FileName,$X,$Y,$Alpha=100)
	Graph setup methods :
	addBorder($Width=3,$R=0,$G=0,$B=0)
	clearScale()
	clearShadow()
	createColorGradientPalette($R1,$G1,$B1,$R2,$G2,$B2,$Shades)
	drawGraphArea($R,$G,$B,$Stripe=FALSE)
	drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1,$RightScale=FALSE)
	drawRightScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1)
	drawXYScale($Data,$DataDescription,$YSerieName,$XSerieName,$R,$G,$B,$WithMargin=0,$Angle=0,$Decimals=1)
	drawGrid($LineWidth,$Mosaic=TRUE,$R=220,$G=220,$B=220,$Alpha=100)
	drawLegend($XPos,$YPos,$DataDescription,$R,$G,$B,$Rs=-1,$Gs=-1,$Bs=-1,$Rt=0,$Gt=0,$Bt=0,$Border=FALSE)
	drawPieLegend($XPos,$YPos,$Data,$DataDescription,$R,$G,$B)
	drawTitle($XPos,$YPos,$Value,$R,$G,$B,$XPos2=-1,$YPos2=-1,$Shadow=FALSE)
	drawTreshold($Value,$R,$G,$B,$ShowLabel=FALSE,$ShowOnRight=FALSE,$TickWidth=4,$FreeText=NULL)
	drawArea($Data,$Serie1,$Serie2,$R,$G,$B,$Alpha = 50)
	drawRadarAxis($Data,$DataDescription,$Mosaic=TRUE,$BorderOffset=10,$A_R=60,$A_G=60,$A_B=60,$S_R=200,$S_G=200,$S_B=200,$MaxValue=-1)
	drawGraphAreaGradient($R,$G,$B,$Decay,$Target=TARGET_GRAPHAREA)
	drawTextBox($X1,$Y1,$X2,$Y2,$Text,$Angle=0,$R=255,$G=255,$B=255,$Align=ALIGN_LEFT,$Shadow=TRUE,$BgR=-1,$BgG=-1,$BgB=-1,$Alpha=100)
	getLegendBoxSize($DataDescription)
	loadColorPalette($FileName,$Delimiter=",")
	reportWarnings($Interface="CLI")
	setGraphArea($X1,$Y1,$X2,$Y2)
	setLabel($Data,$DataDescription,$SerieName,$ValueName,$Caption,$R=210,$G=210,$B=210)
	setColorPalette($ID,$R,$G,$B)
	setCurrency($Currency)
	setDateFormat($Format)
	setFontProperties($FontName,$FontSize)
	setLineStyle($Width=1,$DotSize=0)
	setFixedScale($VMin,$VMax,$Divisions=5,$VXMin=0,$VXMin=0,$XDivisions=5)
	setShadowProperties($XDistance=1,$YDistance=1,$R=60,$G=60,$B=60,$Alpha)
	writeValues($Data,$DataDescription,$Series)
	Graphs methods :
	drawPlotGraph($Data,$DataDescription,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=FALSE)
	drawXYPlotGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1)
	drawLineGraph($Data,$DataDescription,$SerieName="")
	drawXYGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0)
	drawFilledLineGraph($Data,$DataDescription,$Alpha=100,$AroundZero=FALSE)
	drawCubicCurve($Data,$DataDescription,$Accuracy=.1,$SerieName="")
	drawFilledCubicCurve($Data,$DataDescription,$Accuracy=.1,$Alpha=100,$AroundZero=FALSE)
	drawOverlayBarGraph($Data,$DataDescription,$Alpha=50)
	drawBarGraph($Data,$DataDescription,$Shadow=FALSE)
	drawStackedBarGraph($Data,$DataDescription,$Alpha=50,$Contiguous=FALSE)
	drawLimitsGraph($Data,$DataDescription,$R=0,$G=0,$B=0)
	drawRadar($Data,$DataDescription,$BorderOffset=10,$MaxValue=-1)
	drawFilledRadar($Data,$DataDescription,$Alpha=50,$BorderOffset=10,$MaxValue=-1)
	drawBasicPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$R=255,$G=255,$B=255,$Decimals=0)
	drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals = 0)
	drawFlatPieGraphWithShadow($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals = 0)
	drawPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$EnhanceColors=TRUE,$Skew=60,$SpliceHeight=20,$SpliceDistance=0,$Decimals=0)
	Other methods :
	setImageMap($Mode=TRUE,$GraphID="MyGraph")
	getImageMap($MapName,$Flush=TRUE)
	Render($FileName)
	Stroke()
	*/

	/* Declare some script wide constants */
	define("SCALE_NORMAL",1);
	define("SCALE_ADDALL",2);
	define("SCALE_START0",3);
	define("SCALE_ADDALLSTART0",4);
	define("PIE_PERCENTAGE", 1);
	define("PIE_LABELS",2);
	define("PIE_NOLABEL",3);
	define("PIE_PERCENTAGE_LABEL", 4);
	define("TARGET_GRAPHAREA",1);
	define("TARGET_BACKGROUND",2);
	define("ALIGN_TOP_LEFT",1);
	define("ALIGN_TOP_CENTER",2);
	define("ALIGN_TOP_RIGHT",3);
	define("ALIGN_LEFT",4);
	define("ALIGN_CENTER",5);
	define("ALIGN_RIGHT",6);
	define("ALIGN_BOTTOM_LEFT",7);
	define("ALIGN_BOTTOM_CENTER",8);
	define("ALIGN_BOTTOM_RIGHT",9);
	//var_dump(GDFONTPATH);
	//define('GDFONTPATH','W:\home\gopota\www\i');

	/* pChart class definition */
	class pChart
	{
		/* Palettes definition */
		var $Palette = array("0"=>array("R"=>188,"G"=>224,"B"=>46),
		"1"=>array("R"=>224,"G"=>100,"B"=>46),
		"2"=>array("R"=>224,"G"=>214,"B"=>46),
		"3"=>array("R"=>46,"G"=>151,"B"=>224),
		"4"=>array("R"=>176,"G"=>46,"B"=>224),
		"5"=>array("R"=>224,"G"=>46,"B"=>117),
		"6"=>array("R"=>92,"G"=>224,"B"=>46),
		"7"=>array("R"=>224,"G"=>176,"B"=>46));

		/* Some static vars used in the class */
		var $XSize          = NULL;
		var $YSize          = NULL;
		var $Picture        = NULL;
		var $ImageMap       = NULL;

		/* Error management */
		var $ErrorReporting = FALSE;
		var $ErrorInterface = "CLI";
		var $Errors         = NULL;
		var $ErrorFontName  =  "/usr/local/lib/ttf/tahoma.ttf";
		var $ErrorFontSize  = 6;

		/* vars related to the graphing area */
		var $GArea_X1        = NULL;
		var $GArea_Y1        = NULL;
		var $GArea_X2        = NULL;
		var $GArea_Y2        = NULL;
		var $GAreaXOffset    = NULL;
		var $VMax            = NULL;
		var $VMin            = NULL;
		var $VXMax           = NULL;
		var $VXMin           = NULL;
		var $Divisions       = NULL;
		var $XDivisions      = NULL;
		var $DivisionHeight  = NULL;
		var $XDivisionHeight = NULL;
		var $DivisionCount   = NULL;
		var $XDivisionCount  = NULL;
		var $DivisionRatio   = NULL;
		var $XDivisionRatio  = NULL;
		var $DivisionWidth   = NULL;
		var $DataCount       = NULL;
		var $Currency        = "\$";

		/* Text format related vars */
		var $FontName       = NULL;
		var $FontSize       = NULL;
		var $DateFormat     = "d/m/Y";

		/* Lines format related vars */
		var $LineWidth      = 1;
		var $LineDotSize    = 0;

		/* Layer related vars */
		var $Layers         = NULL;

		/* Set antialias quality : 0 is maximum, 100 minimum*/
		var $AntialiasQuality = 0;

		/* Shadow settings */
		var $ShadowActive    = FALSE;
		var $ShadowXDistance = 1;
		var $ShadowYDistance = 1;
		var $ShadowRColor    = 60;
		var $ShadowGColor    = 60;
		var $ShadowBColor    = 60;
		var $ShadowAlpha     = 50;
		var $ShadowBlur      = 0;

		/* Image Map settings */
		var $BuildMap         = FALSE;
		var $MapFunction      = NULL;
		var $tmpFolder        = "tmp/";
		var $MapID            = NULL;

		/* This function create the background picture */
		function pChart($XSize,$YSize)
		{
			$this->XSize   = $XSize;
			$this->YSize   = $YSize;
			$this->Picture = imagecreatetruecolor($XSize,$YSize);

			$C_White =$this->AllocateColor($this->Picture,255,255,255);
			imagefilledrectangle($this->Picture,0,0,$XSize,$YSize,$C_White);
			imagecolortransparent($this->Picture,$C_White);

			$this->setFontProperties("tahoma.ttf",8);
		}

		/* Set if warnings should be reported */
		function reportWarnings($Interface="CLI")
		{
			$this->ErrorReporting = TRUE;
			$this->ErrorInterface = $Interface;
		}

		/* Set the font properties */
		function setFontProperties($FontName,$FontSize)
		{
			$this->FontName = $FontName;
			$this->FontSize = $FontSize;
		}

		/* Set the shadow properties */
		function setShadowProperties($XDistance=1,$YDistance=1,$R=60,$G=60,$B=60,$Alpha=50,$Blur=0)
		{
			$this->ShadowActive    = TRUE;
			$this->ShadowXDistance = $XDistance;
			$this->ShadowYDistance = $YDistance;
			$this->ShadowRColor    = $R;
			$this->ShadowGColor    = $G;
			$this->ShadowBColor    = $B;
			$this->ShadowAlpha     = $Alpha;
			$this->ShadowBlur      = $Blur;
		}

		/* Remove shadow option */
		function clearShadow()
		{
			$this->ShadowActive = FALSE;
		}

		/* Set Palette color */
		function setColorPalette($ID,$R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$this->Palette[$ID]["R"] = $R;
			$this->Palette[$ID]["G"] = $G;
			$this->Palette[$ID]["B"] = $B;
		}

		/* Create a color palette shading from one color to another */
		function createColorGradientPalette($R1,$G1,$B1,$R2,$G2,$B2,$Shades)
		{
			$RFactor = ($R2-$R1)/$Shades;
			$GFactor = ($G2-$G1)/$Shades;
			$BFactor = ($B2-$B1)/$Shades;

			for($i=0;$i<=$Shades-1;$i++)
			{
				$this->Palette[$i]["R"] = $R1+$RFactor*$i;
				$this->Palette[$i]["G"] = $G1+$GFactor*$i;
				$this->Palette[$i]["B"] = $B1+$BFactor*$i;
			}
		}

		/* Load Color Palette from file */
		function loadColorPalette($FileName,$Delimiter=",")
		{
			$handle  = @fopen($FileName,"r");
			$ColorID = 0;
			if ($handle)
			{
				while (!feof($handle))
				{
					$buffer = fgets($handle, 4096);
					$buffer = str_replace(chr(10),"",$buffer);
					$buffer = str_replace(chr(13),"",$buffer);
					$Values = split($Delimiter,$buffer);
					if ( count($Values) == 3 )
					{
						$this->Palette[$ColorID]["R"] = $Values[0];
						$this->Palette[$ColorID]["G"] = $Values[1];
						$this->Palette[$ColorID]["B"] = $Values[2];
						$ColorID++;
					}
				}
			}
		}

		/* Set line style */
		function setLineStyle($Width=1,$DotSize=0)
		{
			$this->LineWidth   = $Width;
			$this->LineDotSize = $DotSize;
		}

		/* Set currency symbol */
		function setCurrency($Currency)
		{
			$this->Currency = $Currency;
		}

		/* Set the graph area location */
		function setGraphArea($X1,$Y1,$X2,$Y2)
		{
			$this->GArea_X1 = $X1;
			$this->GArea_Y1 = $Y1;
			$this->GArea_X2 = $X2;
			$this->GArea_Y2 = $Y2;
		}

		/* Prepare the graph area */
		function drawGraphArea($R,$G,$B,$Stripe=FALSE)
		{
			$this->drawFilledRectangle($this->GArea_X1,$this->GArea_Y1,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B,FALSE);
			$this->drawRectangle($this->GArea_X1,$this->GArea_Y1,$this->GArea_X2,$this->GArea_Y2,$R-40,$G-40,$B-40);

			if ( $Stripe )
			{
				$R2 = $R-15; if ( $R2 < 0 ) { $R2 = 0; }
				$G2 = $R-15; if ( $G2 < 0 ) { $G2 = 0; }
				$B2 = $R-15; if ( $B2 < 0 ) { $B2 = 0; }

				$LineColor =$this->AllocateColor($this->Picture,$R2,$G2,$B2);
				$SkewWidth = $this->GArea_Y2-$this->GArea_Y1-1;

				for($i=$this->GArea_X1-$SkewWidth;$i<=$this->GArea_X2;$i=$i+4)
				{
					$X1 = $i;            $Y1 = $this->GArea_Y2;
					$X2 = $i+$SkewWidth; $Y2 = $this->GArea_Y1;


					if ( $X1 < $this->GArea_X1 )
					{ $X1 = $this->GArea_X1; $Y1 = $this->GArea_Y1 + $X2 - $this->GArea_X1 + 1; }

					if ( $X2 >= $this->GArea_X2 )
					{ $Y2 = $this->GArea_Y1 + $X2 - $this->GArea_X2 +1; $X2 = $this->GArea_X2 - 1; }
					// * Fixed in 1.27 *         { $X2 = $this->GArea_X2 - 1; $Y2 = $this->GArea_Y2 - ($this->GArea_X2 - $X1); }

					imageline($this->Picture,$X1,$Y1,$X2,$Y2+1,$LineColor);
				}
			}
		}

		/* Allow you to clear the scale : used if drawing multiple charts */
		function clearScale()
		{
			$this->VMin       = NULL;
			$this->VMax       = NULL;
			$this->VXMin      = NULL;
			$this->VXMax      = NULL;
			$this->Divisions  = NULL;
			$this->XDivisions = NULL;    }

		/* Allow you to fix the scale, use this to bypass the automatic scaling */
		function setFixedScale($VMin,$VMax,$Divisions=5,$VXMin=0,$VXMax=0,$XDivisions=5)
		{
			$this->VMin      = $VMin;
			$this->VMax      = $VMax;
			$this->Divisions = $Divisions;

			if ( !$VXMin == 0 )
			{
				$this->VXMin      = $VXMin;
				$this->VXMax      = $VXMax;
				$this->XDivisions = $XDivisions;
			}
		}

		/* Wrapper to the drawScale() function allowing a second scale to be drawn */
		function drawRightScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1)
		{
			$this->drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks,$Angle,$Decimals,$WithMargin,$SkipLabels,TRUE);
		}

		/* Compute and draw the scale */
		function drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1,$RightScale=FALSE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateData("drawScale",$Data);

			$C_TextColor         =$this->AllocateColor($this->Picture,$R,$G,$B);

			$this->drawLine($this->GArea_X1,$this->GArea_Y1,$this->GArea_X1,$this->GArea_Y2,$R,$G,$B);
			$this->drawLine($this->GArea_X1,$this->GArea_Y2,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B);

			if ( $this->VMin == NULL && $this->VMax == NULL)
			{
				if (isset($DataDescription["Values"][0]))
				{
					$this->VMin = $Data[0][$DataDescription["Values"][0]];
					$this->VMax = $Data[0][$DataDescription["Values"][0]];
				}
				else { $this->VMin = 2147483647; $this->VMax = -2147483647; }

				/* Compute Min and Max values */
				if ( $ScaleMode == SCALE_NORMAL || $ScaleMode == SCALE_START0 )
				{
					if ( $ScaleMode == SCALE_START0 ) { $this->VMin = 0; }

					foreach ( $Data as $Key => $Values )
					{
						foreach ( $DataDescription["Values"] as $Key2 => $ColName )
						{
							if (isset($Data[$Key][$ColName]))
							{
								$Value = $Data[$Key][$ColName];

								if ( is_numeric($Value) )
								{
									if ( $this->VMax < $Value) { $this->VMax = $Value; }
									if ( $this->VMin > $Value) { $this->VMin = $Value; }
								}
							}
						}
					}
				}
				elseif ( $ScaleMode == SCALE_ADDALL || $ScaleMode == SCALE_ADDALLSTART0 ) /* Experimental */
				{
					if ( $ScaleMode == SCALE_ADDALLSTART0 ) { $this->VMin = 0; }

					foreach ( $Data as $Key => $Values )
					{
						$Sum = 0;
						foreach ( $DataDescription["Values"] as $Key2 => $ColName )
						{
							if (isset($Data[$Key][$ColName]))
							{
								$Value = $Data[$Key][$ColName];
								if ( is_numeric($Value) )
									$Sum  += $Value;
							}
						}
						if ( $this->VMax < $Sum) { $this->VMax = $Sum; }
						if ( $this->VMin > $Sum) { $this->VMin = $Sum; }
					}
				}

				if ( $this->VMax > preg_replace('/\.[0-9]+/','',$this->VMax) )
					$this->VMax = preg_replace('/\.[0-9]+/','',$this->VMax)+1;

				/* If all values are the same */
				if ( $this->VMax == $this->VMin )
				{
					if ( $this->VMax >= 0 ) { $this->VMax++; }
					else { $this->VMin--; }
				}

				$DataRange = $this->VMax - $this->VMin;
				if ( $DataRange == 0 ) { $DataRange = .1; }

				/* Compute automatic scaling */
				$ScaleOk = FALSE; $Factor = 1;
				$MinDivHeight = 25; $MaxDivs = ($this->GArea_Y2 - $this->GArea_Y1) / $MinDivHeight;

				if ( $this->VMin == 0 && $this->VMax == 0 )
				{ $this->VMin = 0; $this->VMax = 2; $Scale = 1; $Divisions = 2;}
				elseif ($MaxDivs > 1)
				{
					while(!$ScaleOk)
					{
						$Scale1 = ( $this->VMax - $this->VMin ) / $Factor;
						$Scale2 = ( $this->VMax - $this->VMin ) / $Factor / 2;
						$Scale4 = ( $this->VMax - $this->VMin ) / $Factor / 4;

						if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale1); $Scale = 1;}
						if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale2); $Scale = 2;}
						if (!$ScaleOk)
						{
							if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
							if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
						}
					}

					if ( floor($this->VMax / $Scale / $Factor) != $this->VMax / $Scale / $Factor)
					{
						$GridID     = floor ( $this->VMax / $Scale / $Factor) + 1;
						$this->VMax = $GridID * $Scale * $Factor;
						$Divisions++;
					}

					if ( floor($this->VMin / $Scale / $Factor) != $this->VMin / $Scale / $Factor)
					{
						$GridID     = floor( $this->VMin / $Scale / $Factor);
						$this->VMin = $GridID * $Scale * $Factor;
						$Divisions++;
					}
				}
				else /* Can occurs for small graphs */
					$Scale = 1;

				if ( !isset($Divisions) )
					$Divisions = 2;

				if ($Scale == 1 && $Divisions%2 == 1)
					$Divisions--;
			}
			else
				$Divisions = $this->Divisions;

			$this->DivisionCount = $Divisions;

			$DataRange = $this->VMax - $this->VMin;
			if ( $DataRange == 0 ) { $DataRange = .1; }

			$this->DivisionHeight = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $Divisions;
			$this->DivisionRatio  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $DataRange;

			$this->GAreaXOffset  = 0;
			if ( count($Data) > 1 )
			{
				if ( $WithMargin == FALSE )
					$this->DivisionWidth = ( $this->GArea_X2 - $this->GArea_X1 ) / (count($Data)-1);
				else
				{
					$this->DivisionWidth = ( $this->GArea_X2 - $this->GArea_X1 ) / (count($Data));
					$this->GAreaXOffset  = $this->DivisionWidth / 2;
				}
			}
			else
			{
				$this->DivisionWidth = $this->GArea_X2 - $this->GArea_X1;
				$this->GAreaXOffset  = $this->DivisionWidth / 2;
			}

			$this->DataCount = count($Data);

			if ( $DrawTicks == FALSE )
				return(0);

			$YPos = $this->GArea_Y2; $XMin = NULL;
			for($i=1;$i<=$Divisions+1;$i++)
			{
				if ( $RightScale )
					$this->drawLine($this->GArea_X2,$YPos,$this->GArea_X2+5,$YPos,$R,$G,$B);
				else
					$this->drawLine($this->GArea_X1,$YPos,$this->GArea_X1-5,$YPos,$R,$G,$B);

				$Value     = $this->VMin + ($i-1) * (( $this->VMax - $this->VMin ) / $Divisions);
				$Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
				if ( $DataDescription["Format"]["Y"] == "number" )
					$Value = $Value.$DataDescription["Unit"]["Y"];
				if ( $DataDescription["Format"]["Y"] == "time" )
					$Value = $this->ToTime($Value);        
				if ( $DataDescription["Format"]["Y"] == "date" )
					$Value = $this->ToDate($Value);        
				if ( $DataDescription["Format"]["Y"] == "metric" )
					$Value = $this->ToMetric($Value);        
				if ( $DataDescription["Format"]["Y"] == "currency" )
					$Value = $this->ToCurrency($Value);        

				$Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextWidth = $Position[2]-$Position[0];

				if ( $RightScale )
				{
					imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X2+10,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);
					if ( $XMin < $this->GArea_X2+15+$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X2+15+$TextWidth; }
				}
				else
				{
					imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1-10-$TextWidth,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);
					if ( $XMin > $this->GArea_X1-10-$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X1-10-$TextWidth; }
				}

				$YPos = $YPos - $this->DivisionHeight;
			}

			/* Write the Y Axis caption if set */ 
			if ( isset($DataDescription["Axis"]["Y"]) )
			{
				$Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription["Axis"]["Y"]);
				$TextHeight = abs($Position[1])+abs($Position[3]);
				$TextTop    = (($this->GArea_Y2 - $this->GArea_Y1) / 2) + $this->GArea_Y1 + ($TextHeight/2);

				if ( $RightScale )
					imagettftext($this->Picture,$this->FontSize,90,$XMin+$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription["Axis"]["Y"]);
				else
					imagettftext($this->Picture,$this->FontSize,90,$XMin-$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription["Axis"]["Y"]);
			}

			/* Horizontal Axis */
			$XPos = $this->GArea_X1 + $this->GAreaXOffset;
			$ID = 1; $YMax = NULL;
			foreach ( $Data as $Key => $Values )
			{
				if ( $ID % $SkipLabels == 0 )
				{
					$this->drawLine(floor($XPos),$this->GArea_Y2,floor($XPos),$this->GArea_Y2+5,$R,$G,$B);
					$Value      = $Data[$Key][$DataDescription["Position"]];
					if ( $DataDescription["Format"]["X"] == "number" )
						$Value = $Value.$DataDescription["Unit"]["X"];
					if ( $DataDescription["Format"]["X"] == "time" )
						$Value = $this->ToTime($Value);        
					if ( $DataDescription["Format"]["X"] == "date" )
						$Value = $this->ToDate($Value);        
					if ( $DataDescription["Format"]["X"] == "metric" )
						$Value = $this->ToMetric($Value);        
					if ( $DataDescription["Format"]["X"] == "currency" )
						$Value = $this->ToCurrency($Value);        

					$Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Value);
					$TextWidth  = abs($Position[2])+abs($Position[0]);
					$TextHeight = abs($Position[1])+abs($Position[3]);

					if ( $Angle == 0 )
					{
						$YPos = $this->GArea_Y2+18;
						imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-floor($TextWidth/2),$YPos,$C_TextColor,$this->FontName,$Value);
					}
					else
					{
						$YPos = $this->GArea_Y2+10+$TextHeight;
						if ( $Angle <= 90 )
							imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
						else
							imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)+$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
					}
					if ( $YMax < $YPos || $YMax == NULL ) { $YMax = $YPos; }
				}

				$XPos = $XPos + $this->DivisionWidth;
				$ID++;
			}

			/* Write the X Axis caption if set */ 
			if ( isset($DataDescription["Axis"]["X"]) )
			{
				$Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription["Axis"]["X"]);
				$TextWidth  = abs($Position[2])+abs($Position[0]);
				$TextLeft   = (($this->GArea_X2 - $this->GArea_X1) / 2) + $this->GArea_X1 + ($TextWidth/2);
				imagettftext($this->Picture,$this->FontSize,0,$TextLeft,$YMax+$this->FontSize+5,$C_TextColor,$this->FontName,$DataDescription["Axis"]["X"]);
			}
		}

		/* Compute and draw the scale for X/Y charts */
		function drawXYScale($Data,$DataDescription,$YSerieName,$XSerieName,$R,$G,$B,$WithMargin=0,$Angle=0,$Decimals=1)
		{
			/* Validate the Data and DataDescription array */
			$this->validateData("drawScale",$Data);

			$C_TextColor =$this->AllocateColor($this->Picture,$R,$G,$B);

			$this->drawLine($this->GArea_X1,$this->GArea_Y1,$this->GArea_X1,$this->GArea_Y2,$R,$G,$B);
			$this->drawLine($this->GArea_X1,$this->GArea_Y2,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B);

			/* Process Y scale */
			if ( $this->VMin == NULL && $this->VMax == NULL)
			{
				$this->VMin = $Data[0][$YSerieName];
				$this->VMax = $Data[0][$YSerieName];

				foreach ( $Data as $Key => $Values )
				{
					if (isset($Data[$Key][$YSerieName]))
					{
						$Value = $Data[$Key][$YSerieName];
						if ( $this->VMax < $Value) { $this->VMax = $Value; }
						if ( $this->VMin > $Value) { $this->VMin = $Value; }
					}
				}

				if ( $this->VMax > preg_replace('/\.[0-9]+/','',$this->VMax) )
					$this->VMax = preg_replace('/\.[0-9]+/','',$this->VMax)+1;

				$DataRange = $this->VMax - $this->VMin;
				if ( $DataRange == 0 ) { $DataRange = .1; }

				/* Compute automatic scaling */
				$ScaleOk = FALSE; $Factor = 1;
				$MinDivHeight = 25; $MaxDivs = ($this->GArea_Y2 - $this->GArea_Y1) / $MinDivHeight;

				if ( $this->VMin == 0 && $this->VMax == 0 )
				{ $this->VMin = 0; $this->VMax = 2; $Scale = 1; $Divisions = 2;}
				elseif ($MaxDivs > 1)
				{
					while(!$ScaleOk)
					{
						$Scale1 = ( $this->VMax - $this->VMin ) / $Factor;
						$Scale2 = ( $this->VMax - $this->VMin ) / $Factor / 2;
						$Scale4 = ( $this->VMax - $this->VMin ) / $Factor / 4;

						if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale1); $Scale = 1;}
						if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale2); $Scale = 2;}
						if (!$ScaleOk)
						{
							if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
							if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
						}
					}

					if ( floor($this->VMax / $Scale / $Factor) != $this->VMax / $Scale / $Factor)
					{
						$GridID     = floor ( $this->VMax / $Scale / $Factor) + 1;
						$this->VMax = $GridID * $Scale * $Factor;
						$Divisions++;
					}

					if ( floor($this->VMin / $Scale / $Factor) != $this->VMin / $Scale / $Factor)
					{
						$GridID     = floor( $this->VMin / $Scale / $Factor);
						$this->VMin = $GridID * $Scale * $Factor;
						$Divisions++;
					}
				}
				else /* Can occurs for small graphs */
					$Scale = 1;

				if ( !isset($Divisions) )
					$Divisions = 2;

				if ( $this->isRealInt(($this->VMax-$this->VMin)/($Divisions-1)))
					$Divisions--;
				elseif ( $this->isRealInt(($this->VMax-$this->VMin)/($Divisions+1)))
					$Divisions++;
			}
			else
				$Divisions = $this->Divisions;

			$this->DivisionCount = $Divisions;

			$DataRange = $this->VMax - $this->VMin;
			if ( $DataRange == 0 ) { $DataRange = .1; }

			$this->DivisionHeight = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $Divisions;
			$this->DivisionRatio  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $DataRange;

			$YPos = $this->GArea_Y2; $XMin = NULL;
			for($i=1;$i<=$Divisions+1;$i++)
			{
				$this->drawLine($this->GArea_X1,$YPos,$this->GArea_X1-5,$YPos,$R,$G,$B);
				$Value     = $this->VMin + ($i-1) * (( $this->VMax - $this->VMin ) / $Divisions);
				$Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
				if ( $DataDescription["Format"]["Y"] == "number" )
					$Value = $Value.$DataDescription["Unit"]["Y"];
				if ( $DataDescription["Format"]["Y"] == "time" )
					$Value = $this->ToTime($Value);        
				if ( $DataDescription["Format"]["Y"] == "date" )
					$Value = $this->ToDate($Value);        
				if ( $DataDescription["Format"]["Y"] == "metric" )
					$Value = $this->ToMetric($Value);        
				if ( $DataDescription["Format"]["Y"] == "currency" )
					$Value = $this->ToCurrency($Value);        

				$Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextWidth = $Position[2]-$Position[0];
				imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1-10-$TextWidth,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);

				if ( $XMin > $this->GArea_X1-10-$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X1-10-$TextWidth; }

				$YPos = $YPos - $this->DivisionHeight;
			}

			/* Process X scale */
			if ( $this->VXMin == NULL && $this->VXMax == NULL)
			{
				$this->VXMin = $Data[0][$XSerieName];
				$this->VXMax = $Data[0][$XSerieName];

				foreach ( $Data as $Key => $Values )
				{
					if (isset($Data[$Key][$XSerieName]))
					{
						$Value = $Data[$Key][$XSerieName];
						if ( $this->VXMax < $Value) { $this->VXMax = $Value; }
						if ( $this->VXMin > $Value) { $this->VXMin = $Value; }
					}
				}

				if ( $this->VXMax > preg_replace('/\.[0-9]+/','',$this->VXMax) )
					$this->VXMax = preg_replace('/\.[0-9]+/','',$this->VXMax)+1;

				$DataRange = $this->VMax - $this->VMin;
				if ( $DataRange == 0 ) { $DataRange = .1; }

				/* Compute automatic scaling */
				$ScaleOk = FALSE; $Factor = 1;
				$MinDivWidth = 25; $MaxDivs = ($this->GArea_X2 - $this->GArea_X1) / $MinDivWidth;

				if ( $this->VXMin == 0 && $this->VXMax == 0 )
				{ $this->VXMin = 0; $this->VXMax = 2; $Scale = 1; $XDivisions = 2;}
				elseif ($MaxDivs > 1)
				{
					while(!$ScaleOk)
					{
						$Scale1 = ( $this->VXMax - $this->VXMin ) / $Factor;
						$Scale2 = ( $this->VXMax - $this->VXMin ) / $Factor / 2;
						$Scale4 = ( $this->VXMax - $this->VXMin ) / $Factor / 4;

						if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $XDivisions = floor($Scale1); $Scale = 1;}
						if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $XDivisions = floor($Scale2); $Scale = 2;}
						if (!$ScaleOk)
						{
							if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
							if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
						}
					}

					if ( floor($this->VXMax / $Scale / $Factor) != $this->VXMax / $Scale / $Factor)
					{
						$GridID     = floor ( $this->VXMax / $Scale / $Factor) + 1;
						$this->VXMax = $GridID * $Scale * $Factor;
						$XDivisions++;
					}

					if ( floor($this->VXMin / $Scale / $Factor) != $this->VXMin / $Scale / $Factor)
					{
						$GridID     = floor( $this->VXMin / $Scale / $Factor);
						$this->VXMin = $GridID * $Scale * $Factor;
						$XDivisions++;
					}
				}
				else /* Can occurs for small graphs */
					$Scale = 1;

				if ( !isset($XDivisions) )
					$XDivisions = 2;

				if ( $this->isRealInt(($this->VXMax-$this->VXMin)/($XDivisions-1)))
					$XDivisions--;
				elseif ( $this->isRealInt(($this->VXMax-$this->VXMin)/($XDivisions+1)))
					$XDivisions++;
			}
			else
				$XDivisions = $this->XDivisions;

			$this->XDivisionCount = $Divisions;
			$this->DataCount      = $Divisions + 2;

			$XDataRange = $this->VXMax - $this->VXMin;
			if ( $XDataRange == 0 ) { $XDataRange = .1; }

			$this->DivisionWidth   = ( $this->GArea_X2 - $this->GArea_X1 ) / $XDivisions;
			$this->XDivisionRatio  = ( $this->GArea_X2 - $this->GArea_X1 ) / $XDataRange;

			$XPos = $this->GArea_X1; $YMax = NULL;
			for($i=1;$i<=$XDivisions+1;$i++)
			{
				$this->drawLine($XPos,$this->GArea_Y2,$XPos,$this->GArea_Y2+5,$R,$G,$B);

				$Value     = $this->VXMin + ($i-1) * (( $this->VXMax - $this->VXMin ) / $XDivisions);
				$Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
				if ( $DataDescription["Format"]["Y"] == "number" )
					$Value = $Value.$DataDescription["Unit"]["Y"];
				if ( $DataDescription["Format"]["Y"] == "time" )
					$Value = $this->ToTime($Value);        
				if ( $DataDescription["Format"]["Y"] == "date" )
					$Value = $this->ToDate($Value);        
				if ( $DataDescription["Format"]["Y"] == "metric" )
					$Value = $this->ToMetric($Value);        
				if ( $DataDescription["Format"]["Y"] == "currency" )
					$Value = $this->ToCurrency($Value);        

				$Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Value);
				$TextWidth  = abs($Position[2])+abs($Position[0]);
				$TextHeight = abs($Position[1])+abs($Position[3]);

				if ( $Angle == 0 )
				{
					$YPos = $this->GArea_Y2+18;
					imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-floor($TextWidth/2),$YPos,$C_TextColor,$this->FontName,$Value);
				}
				else
				{
					$YPos = $this->GArea_Y2+10+$TextHeight;
					if ( $Angle <= 90 )
						imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
					else
						imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)+$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
				}

				if ( $YMax < $YPos || $YMax == NULL ) { $YMax = $YPos; }

				$XPos = $XPos + $this->DivisionWidth;
			}

			/* Write the Y Axis caption if set */ 
			if ( isset($DataDescription["Axis"]["Y"]) )
			{
				$Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription["Axis"]["Y"]);
				$TextHeight = abs($Position[1])+abs($Position[3]);
				$TextTop    = (($this->GArea_Y2 - $this->GArea_Y1) / 2) + $this->GArea_Y1 + ($TextHeight/2);
				imagettftext($this->Picture,$this->FontSize,90,$XMin-$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription["Axis"]["Y"]);
			}

			/* Write the X Axis caption if set */ 
			if ( isset($DataDescription["Axis"]["X"]) )
			{
				$Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription["Axis"]["X"]);
				$TextWidth  = abs($Position[2])+abs($Position[0]);
				$TextLeft   = (($this->GArea_X2 - $this->GArea_X1) / 2) + $this->GArea_X1 + ($TextWidth/2);
				imagettftext($this->Picture,$this->FontSize,0,$TextLeft,$YMax+$this->FontSize+5,$C_TextColor,$this->FontName,$DataDescription["Axis"]["X"]);
			}
		}

		/* Compute and draw the scale */
		function drawGrid($LineWidth,$Mosaic=TRUE,$R=220,$G=220,$B=220,$Alpha=100)
		{
			/* Draw mosaic */
			if ( $Mosaic )
			{
				$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
				$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

				$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
				$C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
				imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
				imagecolortransparent($this->Layers[0],$C_White);

				$C_Rectangle =$this->AllocateColor($this->Layers[0],250,250,250);

				$YPos  = $LayerHeight; //$this->GArea_Y2-1;
				$LastY = $YPos;
				for($i=0;$i<=$this->DivisionCount;$i++)
				{
					$LastY = $YPos;
					$YPos  = $YPos - $this->DivisionHeight;

					if ( $YPos <= 0 ) { $YPos = 1; }

					if ( $i % 2 == 0 )
					{
						imagefilledrectangle($this->Layers[0],1,$YPos,$LayerWidth-1,$LastY,$C_Rectangle);
					}
				}
				imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
				imagedestroy($this->Layers[0]);
			}

			/* Horizontal lines */
			$YPos = $this->GArea_Y2 - $this->DivisionHeight;
			for($i=1;$i<=$this->DivisionCount;$i++)
			{
				if ( $YPos > $this->GArea_Y1 && $YPos < $this->GArea_Y2 )
					$this->drawDottedLine($this->GArea_X1,$YPos,$this->GArea_X2,$YPos,$LineWidth,$R,$G,$B);

				$YPos = $YPos - $this->DivisionHeight;
			}

			/* Vertical lines */
			if ( $this->GAreaXOffset == 0 )
			{ $XPos = $this->GArea_X1 + $this->DivisionWidth + $this->GAreaXOffset; $ColCount = $this->DataCount-2; }
			else
			{ $XPos = $this->GArea_X1 + $this->GAreaXOffset; $ColCount = floor( ($this->GArea_X2 - $this->GArea_X1) / $this->DivisionWidth ); }

			for($i=1;$i<=$ColCount;$i++)
			{
				if ( $XPos > $this->GArea_X1 && $XPos < $this->GArea_X2 )
					$this->drawDottedLine(floor($XPos),$this->GArea_Y1,floor($XPos),$this->GArea_Y2,$LineWidth,$R,$G,$B);
				$XPos = $XPos + $this->DivisionWidth;
			}
		}

		/* retrieve the legends size */
		function getLegendBoxSize($DataDescription)
		{
			if ( !isset($DataDescription["Description"]) )
				return(-1);

			/* <-10->[8]<-4->Text<-10-> */
			$MaxWidth = 0; $MaxHeight = 8;
			foreach($DataDescription["Description"] as $Key => $Value)
			{
				$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextWidth  = $Position[2]-$Position[0];
				$TextHeight = $Position[1]-$Position[7];
				if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }
				$MaxHeight = $MaxHeight + $TextHeight + 4;
			}
			$MaxHeight = $MaxHeight - 3;
			$MaxWidth  = $MaxWidth + 32;

			return(array($MaxWidth,$MaxHeight));
		}

		/* Draw the data legends */
		function drawLegend($XPos,$YPos,$DataDescription,$R,$G,$B,$Rs=-1,$Gs=-1,$Bs=-1,$Rt=0,$Gt=0,$Bt=0,$Border=TRUE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawLegend",$DataDescription);

			if ( !isset($DataDescription["Description"]) )
				return(-1);

			$C_TextColor =$this->AllocateColor($this->Picture,$Rt,$Gt,$Bt);

			/* <-10->[8]<-4->Text<-10-> */
			$MaxWidth = 0; $MaxHeight = 8;
			foreach($DataDescription["Description"] as $Key => $Value)
			{
				$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextWidth  = $Position[2]-$Position[0];
				$TextHeight = $Position[1]-$Position[7];
				if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }
				$MaxHeight = $MaxHeight + $TextHeight + 4;
			}
			$MaxHeight = $MaxHeight - 5;
			$MaxWidth  = $MaxWidth + 32;

			if ( $Rs == -1 || $Gs == -1 || $Bs == -1 )
			{ $Rs = $R-30; $Gs = $G-30; $Bs = $B-30; }

			if ( $Border )
			{
				$this->drawFilledRoundedRectangle($XPos+1,$YPos+1,$XPos+$MaxWidth+1,$YPos+$MaxHeight+1,5,$Rs,$Gs,$Bs);
				$this->drawFilledRoundedRectangle($XPos,$YPos,$XPos+$MaxWidth,$YPos+$MaxHeight,5,$R,$G,$B);
			}

			$YOffset = 4 + $this->FontSize; $ID = 0;
			foreach($DataDescription["Description"] as $Key => $Value)
			{
				$this->drawFilledRoundedRectangle($XPos+10,$YPos+$YOffset-4,$XPos+14,$YPos+$YOffset-4,2,$this->Palette[$ID]["R"],$this->Palette[$ID]["G"],$this->Palette[$ID]["B"]);
				imagettftext($this->Picture,$this->FontSize,0,$XPos+22,$YPos+$YOffset,$C_TextColor,$this->FontName,$Value);

				$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextHeight = $Position[1]-$Position[7];

				$YOffset = $YOffset + $TextHeight + 4;
				$ID++;
			}
		}

		/* Draw the data legends */
		function drawPieLegend($XPos,$YPos,$Data,$DataDescription,$R,$G,$B)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawPieLegend",$DataDescription,FALSE);
			$this->validateData("drawPieLegend",$Data);

			if ( !isset($DataDescription["Position"]) )
				return(-1);

			$C_TextColor =$this->AllocateColor($this->Picture,0,0,0);

			/* <-10->[8]<-4->Text<-10-> */
			$MaxWidth = 0; $MaxHeight = 8;
			foreach($Data as $Key => $Value)
			{
				$Value2 = $Value[$DataDescription["Position"]];
				$Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value2);
				$TextWidth = $Position[2]-$Position[0];
				$TextHeight = $Position[1]-$Position[7];
				if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }

				$MaxHeight = $MaxHeight + $TextHeight + 4;
			}
			$MaxHeight = $MaxHeight - 3;
			$MaxWidth  = $MaxWidth + 32;

			$this->drawFilledRoundedRectangle($XPos+1,$YPos+1,$XPos+$MaxWidth+1,$YPos+$MaxHeight+1,5,$R-30,$G-30,$B-30);
			$this->drawFilledRoundedRectangle($XPos,$YPos,$XPos+$MaxWidth,$YPos+$MaxHeight,5,$R,$G,$B);

			$YOffset = 4 + $this->FontSize; $ID = 0;
			foreach($Data as $Key => $Value)
			{
				$Value2     = $Value[$DataDescription["Position"]];
				$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value2);
				$TextHeight = $Position[1]-$Position[7];
				$this->drawFilledRectangle($XPos+10,$YPos+$YOffset-6,$XPos+14,$YPos+$YOffset-2,$this->Palette[$ID]["R"],$this->Palette[$ID]["G"],$this->Palette[$ID]["B"]);

				imagettftext($this->Picture,$this->FontSize,0,$XPos+22,$YPos+$YOffset,$C_TextColor,$this->FontName,$Value2);
				$YOffset = $YOffset + $TextHeight + 4;
				$ID++;
			}
		}

		/* Draw the graph title */
		function drawTitle($XPos,$YPos,$Value,$R,$G,$B,$XPos2=-1,$YPos2=-1,$Shadow=FALSE)
		{
			$C_TextColor = $this->AllocateColor($this->Picture,$R,$G,$B);

			if ( $XPos2 != -1 )
			{
				$Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextWidth = $Position[2]-$Position[0];
				$XPos      = floor(( $XPos2 - $XPos - $TextWidth ) / 2 ) + $XPos;
			}

			if ( $YPos2 != -1 )
			{
				$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
				$TextHeight = $Position[5]-$Position[3];
				$YPos       = floor(( $YPos2 - $YPos - $TextHeight ) / 2 ) + $YPos;
			}

			if ( $Shadow )
			{
				$C_ShadowColor = $this->AllocateColor($this->Picture,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor);
				imagettftext($this->Picture,$this->FontSize,0,$XPos+$this->ShadowXDistance,$YPos+$this->ShadowYDistance,$C_ShadowColor,$this->FontName,$Value);     
			}

			imagettftext($this->Picture,$this->FontSize,0,$XPos,$YPos,$C_TextColor,$this->FontName,$Value);     
		}

		/* Draw a text box with text align & alpha properties */
		function drawTextBox($X1,$Y1,$X2,$Y2,$Text,$Angle=0,$R=255,$G=255,$B=255,$Align=ALIGN_LEFT,$Shadow=TRUE,$BgR=-1,$BgG=-1,$BgB=-1,$Alpha=100)
		{
			$Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Text);
			$TextWidth  = $Position[2]-$Position[0];
			$TextHeight = $Position[5]-$Position[3];
			$AreaWidth  = $X2 - $X1;
			$AreaHeight = $Y2 - $Y1;

			if ( $BgR != -1 && $BgG != -1 && $BgB != -1 )
				$this->drawFilledRectangle($X1,$Y1,$X2,$Y2,$BgR,$BgG,$BgB,FALSE,$Alpha);

			if ( $Align == ALIGN_TOP_LEFT )      { $X = $X1+1; $Y = $Y1+$this->FontSize+1; }
			if ( $Align == ALIGN_TOP_CENTER )    { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y1+$this->FontSize+1; }
			if ( $Align == ALIGN_TOP_RIGHT )     { $X = $X2-$TextWidth-1; $Y = $Y1+$this->FontSize+1; }
			if ( $Align == ALIGN_LEFT )          { $X = $X1+1; $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
			if ( $Align == ALIGN_CENTER )        { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
			if ( $Align == ALIGN_RIGHT )         { $X = $X2-$TextWidth-1; $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
			if ( $Align == ALIGN_BOTTOM_LEFT )   { $X = $X1+1; $Y = $Y2-1; }
			if ( $Align == ALIGN_BOTTOM_CENTER ) { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y2-1; }
			if ( $Align == ALIGN_BOTTOM_RIGHT )  { $X = $X2-$TextWidth-1; $Y = $Y2-1; }

			$C_TextColor   =$this->AllocateColor($this->Picture,$R,$G,$B);
			$C_ShadowColor =$this->AllocateColor($this->Picture,0,0,0);
			if ( $Shadow )
				imagettftext($this->Picture,$this->FontSize,$Angle,$X+1,$Y+1,$C_ShadowColor,$this->FontName,$Text);     

			imagettftext($this->Picture,$this->FontSize,$Angle,$X,$Y,$C_TextColor,$this->FontName,$Text);     
		}

		/* Compute and draw the scale */
		function drawTreshold($Value,$R,$G,$B,$ShowLabel=FALSE,$ShowOnRight=FALSE,$TickWidth=4,$FreeText=NULL)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_TextColor =$this->AllocateColor($this->Picture,$R,$G,$B);
			$Y = $this->GArea_Y2 - ($Value - $this->VMin) * $this->DivisionRatio;

			if ( $Y <= $this->GArea_Y1 || $Y >= $this->GArea_Y2 )
				return(-1);

			if ( $TickWidth == 0 )
				$this->drawLine($this->GArea_X1,$Y,$this->GArea_X2,$Y,$R,$G,$B);
			else
				$this->drawDottedLine($this->GArea_X1,$Y,$this->GArea_X2,$Y,$TickWidth,$R,$G,$B);

			if ( $ShowLabel )
			{
				if ( $FreeText == NULL )
				{ $Label = $Value; } else { $Label = $FreeText; }

				if ( $ShowOnRight )
					imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X2+2,$Y+($this->FontSize/2),$C_TextColor,$this->FontName,$Label);
				else
					imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1+2,$Y-($this->FontSize/2),$C_TextColor,$this->FontName,$Label);
			}
		}

		/* This function put a label on a specific point */
		function setLabel($Data,$DataDescription,$SerieName,$ValueName,$Caption,$R=210,$G=210,$B=210)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("setLabel",$DataDescription);
			$this->validateData("setLabel",$Data);
			$ShadowFactor = 100;
			$C_Label      =$this->AllocateColor($this->Picture,$R,$G,$B);
			$C_Shadow     =$this->AllocateColor($this->Picture,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
			$C_TextColor  =$this->AllocateColor($this->Picture,0,0,0);

			$Cp = 0; $Found = FALSE;
			foreach ( $Data as $Key => $Value )
			{
				if ( $Data[$Key][$DataDescription["Position"]] == $ValueName )
				{ $NumericalValue = $Data[$Key][$SerieName]; $Found = TRUE; }
				if ( !$Found )
					$Cp++;
			}

			$XPos = $this->GArea_X1 + $this->GAreaXOffset + ( $this->DivisionWidth * $Cp ) + 2;
			$YPos = $this->GArea_Y2 - ($NumericalValue - $this->VMin) * $this->DivisionRatio;

			$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
			$TextHeight = $Position[3] - $Position[5];
			$TextWidth  = $Position[2]-$Position[0] + 2;
			$TextOffset = floor($TextHeight/2);

			// Shadow
			$Poly = array($XPos+1,$YPos+1,$XPos + 9,$YPos - $TextOffset,$XPos + 8,$YPos + $TextOffset + 2);
			imagefilledpolygon($this->Picture,$Poly,3,$C_Shadow);
			$this->drawLine($XPos,$YPos+1,$XPos + 9,$YPos - $TextOffset - .2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
			$this->drawLine($XPos,$YPos+1,$XPos + 9,$YPos + $TextOffset + 2.2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
			$this->drawFilledRectangle($XPos + 9,$YPos - $TextOffset-.2,$XPos + 13 + $TextWidth,$YPos + $TextOffset + 2.2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);

			// Label background
			$Poly = array($XPos,$YPos,$XPos + 8,$YPos - $TextOffset - 1,$XPos + 8,$YPos + $TextOffset + 1);
			imagefilledpolygon($this->Picture,$Poly,3,$C_Label);
			$this->drawLine($XPos-1,$YPos,$XPos + 8,$YPos - $TextOffset - 1.2,$R,$G,$B);
			$this->drawLine($XPos-1,$YPos,$XPos + 8,$YPos + $TextOffset + 1.2,$R,$G,$B);
			$this->drawFilledRectangle($XPos + 8,$YPos - $TextOffset - 1.2,$XPos + 12 + $TextWidth,$YPos + $TextOffset + 1.2,$R,$G,$B);

			imagettftext($this->Picture,$this->FontSize,0,$XPos + 10,$YPos + $TextOffset,$C_TextColor,$this->FontName,$Caption);
		}

		/* This function draw a plot graph */
		function drawPlotGraph($Data,$DataDescription,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=FALSE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawPlotGraph",$DataDescription);
			$this->validateData("drawPlotGraph",$Data);

			$GraphID = 0;
			$Ro = $R2; $Go = $G2; $Bo = $B2;

			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$R = $this->Palette[$ColorID]["R"];
				$G = $this->Palette[$ColorID]["G"];
				$B = $this->Palette[$ColorID]["B"];
				$R2 = $Ro; $G2 = $Go; $B2 = $Bo;

				if ( isset($DataDescription["Symbol"][$ColName]) )
				{
					$Is_Alpha = ((ord ( file_get_contents ($DataDescription["Symbol"][$ColName], false, null, 25, 1)) & 6) & 4) == 4;

					$Infos       = getimagesize($DataDescription["Symbol"][$ColName]);
					$ImageWidth  = $Infos[0];
					$ImageHeight = $Infos[1];
					$Symbol      = imagecreatefromgif($DataDescription["Symbol"][$ColName]);
				}

				$XPos  = $this->GArea_X1 + $this->GAreaXOffset;
				$Hsize = round($BigRadius/2);
				$R3 = -1; $G3 = -1; $B3 = -1;
				foreach ( $Data as $Key => $Values )
				{
					$Value = $Data[$Key][$ColName];
					$YPos  = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

					/* Save point into the image map if option activated */
					if ( $this->BuildMap )
						$this->addToImageMap($XPos-$Hsize,$YPos-$Hsize,$XPos+1+$Hsize,$YPos+$Hsize+1,$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"Plot");

					if ( is_numeric($Value) )
					{
						if ( !isset($DataDescription["Symbol"][$ColName]) )
						{

							if ( $Shadow )
							{
								if ( $R3 !=-1 && $G3 !=-1 && $B3 !=-1 )
									$this->drawFilledCircle($XPos+2,$YPos+2,$BigRadius,$R3,$G3,$B3);
								else
								{
									$R3 = $this->Palette[$ColorID]["R"]-20; if ( $R3 < 0 ) { $R3 = 0; }
									$G3 = $this->Palette[$ColorID]["G"]-20; if ( $G3 < 0 ) { $G3 = 0; }
									$B3 = $this->Palette[$ColorID]["B"]-20; if ( $B3 < 0 ) { $B3 = 0; }
									$this->drawFilledCircle($XPos+2,$YPos+2,$BigRadius,$R3,$G3,$B3);
								}
							}

							$this->drawFilledCircle($XPos+1,$YPos+1,$BigRadius,$R,$G,$B);

							if ( $SmallRadius != 0 )
							{
								if ( $R2 !=-1 && $G2 !=-1 && $B2 !=-1 )
									$this->drawFilledCircle($XPos+1,$YPos+1,$SmallRadius,$R2,$G2,$B2);
								else
								{
									$R2 = $this->Palette[$ColorID]["R"]-15; if ( $R2 < 0 ) { $R2 = 0; }
									$G2 = $this->Palette[$ColorID]["G"]-15; if ( $G2 < 0 ) { $G2 = 0; }
									$B2 = $this->Palette[$ColorID]["B"]-15; if ( $B2 < 0 ) { $B2 = 0; }

									$this->drawFilledCircle($XPos+1,$YPos+1,$SmallRadius,$R2,$G2,$B2);
								}
							}
						}
						else
						{
							imagecopymerge($this->Picture,$Symbol,$XPos+1-$ImageWidth/2,$YPos+1-$ImageHeight/2,0,0,$ImageWidth,$ImageHeight,100);
						}
					}

					$XPos = $XPos + $this->DivisionWidth;
				}
				$GraphID++;
			}
		}

		/* This function draw a plot graph in an X/Y space */
		function drawXYPlotGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=TRUE)
		{
			$R = $this->Palette[$PaletteID]["R"];
			$G = $this->Palette[$PaletteID]["G"];
			$B = $this->Palette[$PaletteID]["B"];
			$R3 = -1; $G3 = -1; $B3 = -1;

			$YLast = -1; $XLast = -1;
			foreach ( $Data as $Key => $Values )
			{
				if ( isset($Data[$Key][$YSerieName]) && isset($Data[$Key][$XSerieName]) )
				{
					$X = $Data[$Key][$XSerieName];
					$Y = $Data[$Key][$YSerieName];

					$Y = $this->GArea_Y2 - (($Y-$this->VMin) * $this->DivisionRatio);
					$X = $this->GArea_X1 + (($X-$this->VXMin) * $this->XDivisionRatio);


					if ( $Shadow )
					{
						if ( $R3 !=-1 && $G3 !=-1 && $B3 !=-1 )
							$this->drawFilledCircle($X+2,$Y+2,$BigRadius,$R3,$G3,$B3);
						else
						{
							$R3 = $this->Palette[$PaletteID]["R"]-20; if ( $R < 0 ) { $R = 0; }
							$G3 = $this->Palette[$PaletteID]["G"]-20; if ( $G < 0 ) { $G = 0; }
							$B3 = $this->Palette[$PaletteID]["B"]-20; if ( $B < 0 ) { $B = 0; }
							$this->drawFilledCircle($X+2,$Y+2,$BigRadius,$R3,$G3,$B3);
						}
					}

					$this->drawFilledCircle($X+1,$Y+1,$BigRadius,$R,$G,$B);

					if ( $R2 !=-1 && $G2 !=-1 && $B2 !=-1 )
						$this->drawFilledCircle($X+1,$Y+1,$SmallRadius,$R2,$G2,$B2);
					else
					{
						$R2 = $this->Palette[$PaletteID]["R"]+20; if ( $R > 255 ) { $R = 255; }
						$G2 = $this->Palette[$PaletteID]["G"]+20; if ( $G > 255 ) { $G = 255; }
						$B2 = $this->Palette[$PaletteID]["B"]+20; if ( $B > 255 ) { $B = 255; }
						$this->drawFilledCircle($X+1,$Y+1,$SmallRadius,$R2,$G2,$B2);
					}
				}
			}

		}

		/* This function draw an area between two series */
		function drawArea($Data,$Serie1,$Serie2,$R,$G,$B,$Alpha = 50)
		{
			/* Validate the Data and DataDescription array */
			$this->validateData("drawArea",$Data);

			$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
			$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

			$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
			$C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
			imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
			imagecolortransparent($this->Layers[0],$C_White);

			$C_Graph =$this->AllocateColor($this->Layers[0],$R,$G,$B);

			$XPos     = $this->GAreaXOffset;
			$LastXPos = -1;
			foreach ( $Data as $Key => $Values )
			{
				$Value1 = $Data[$Key][$Serie1];
				$Value2 = $Data[$Key][$Serie2];
				$YPos1  = $LayerHeight - (($Value1-$this->VMin) * $this->DivisionRatio);
				$YPos2  = $LayerHeight - (($Value2-$this->VMin) * $this->DivisionRatio);

				if ( $LastXPos != -1 )
				{
					$Points   = "";
					$Points[] = $LastXPos; $Points[] = $LastYPos1;
					$Points[] = $LastXPos; $Points[] = $LastYPos2;
					$Points[] = $XPos; $Points[] = $YPos2;
					$Points[] = $XPos; $Points[] = $YPos1;

					imagefilledpolygon($this->Layers[0],$Points,4,$C_Graph);
				}

				$LastYPos1 = $YPos1;
				$LastYPos2 = $YPos2;
				$LastXPos  = $XPos;

				$XPos = $XPos + $this->DivisionWidth;
			}

			imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
			imagedestroy($this->Layers[0]);
		}


		/* This function write the values of the specified series */
		function writeValues($Data,$DataDescription,$Series)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("writeValues",$DataDescription);
			$this->validateData("writeValues",$Data);

			if ( !is_array($Series) ) { $Series = array($Series); }     

			foreach($Series as $Key => $Serie)
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $Serie ) { $ColorID = $ID; }; $ID++; }

				$XPos  = $this->GArea_X1 + $this->GAreaXOffset;
				$XLast = -1;
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$Serie]) && is_numeric($Data[$Key][$Serie]))
					{
						$Value = $Data[$Key][$Serie];
						$YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

						$Positions = imagettfbbox($this->FontSize,0,$this->FontName,$Value);
						$Width  = $Positions[2] - $Positions[6]; $XOffset = $XPos - ($Width/2); 
						$Height = $Positions[3] - $Positions[7]; $YOffset = $YPos - 4;

						$C_TextColor =$this->AllocateColor($this->Picture,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
						imagettftext($this->Picture,$this->FontSize,0,$XOffset,$YOffset,$C_TextColor,$this->FontName,$Value);
					}
					$XPos = $XPos + $this->DivisionWidth;
				}

			}
		}

		/* This function draw a line graph */
		function drawLineGraph($Data,$DataDescription,$SerieName="")
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawLineGraph",$DataDescription);
			$this->validateData("drawLineGraph",$Data);

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				if ( $SerieName == "" || $SerieName == $ColName )
				{
					$XPos  = $this->GArea_X1 + $this->GAreaXOffset;
					$XLast = -1;
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
						{
							$Value = $Data[$Key][$ColName];
							$YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

							/* Save point into the image map if option activated */
							if ( $this->BuildMap )
								$this->addToImageMap($XPos-3,$YPos-3,$XPos+3,$YPos+3,$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"Line");

							if (!is_numeric($Value)) { $XLast = -1; }
							if ( $XLast != -1 )
								$this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE);

							$XLast = $XPos;
							$YLast = $YPos;
							if (!is_numeric($Value)) { $XLast = -1; }
						}
						$XPos = $XPos + $this->DivisionWidth;
					}
					$GraphID++;
				}
			}
		}

		/* This function draw a line graph */
		function drawXYGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0)
		{
			$YLast = -1; $XLast = -1;
			foreach ( $Data as $Key => $Values )
			{
				if ( isset($Data[$Key][$YSerieName]) && isset($Data[$Key][$XSerieName]) )
				{
					$X = $Data[$Key][$XSerieName];
					$Y = $Data[$Key][$YSerieName];

					$Y = $this->GArea_Y2 - (($Y-$this->VMin) * $this->DivisionRatio);
					$X = $this->GArea_X1 + (($X-$this->VXMin) * $this->XDivisionRatio);

					if ($XLast != -1 && $YLast != -1)
					{
						$this->drawLine($XLast,$YLast,$X,$Y,$this->Palette[$PaletteID]["R"],$this->Palette[$PaletteID]["G"],$this->Palette[$PaletteID]["B"],TRUE);
					}

					$XLast = $X;
					$YLast = $Y;
				}
			}
		}

		/* This function draw a cubic curve */
		function drawCubicCurve($Data,$DataDescription,$Accuracy=.1,$SerieName="")
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawCubicCurve",$DataDescription);
			$this->validateData("drawCubicCurve",$Data);

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				if ( $SerieName == "" || $SerieName == $ColName )
				{
					$XIn = ""; $Yin = ""; $Yt = ""; $U = "";
					$XIn[0] = 0; $YIn[0] = 0;

					$ID = 0;
					foreach ( $DataDescription["Description"] as $keyI => $ValueI )
					{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

					$Index = 1;
					$XLast = -1; $Missing = "";
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]) )
						{
							$Value = $Data[$Key][$ColName];
							$XIn[$Index] = $Index;
							$YIn[$Index] = $Value;
							if ( !is_numeric($Value) ) { $Missing[$Index] = TRUE; }
							$Index++;
						}
					}
					$Index--;

					$Yt[0] = 0;
					$Yt[1] = 0;
					$U[1]  = 0;
					for($i=2;$i<=$Index-1;$i++)
					{
						$Sig    = ($XIn[$i] - $XIn[$i-1]) / ($XIn[$i+1] - $XIn[$i-1]);
						$p      = $Sig * $Yt[$i-1] + 2;
						$Yt[$i] = ($Sig - 1) / $p;
						$U[$i]  = ($YIn[$i+1] - $YIn[$i]) / ($XIn[$i+1] - $XIn[$i]) - ($YIn[$i] - $YIn[$i-1]) / ($XIn[$i] - $XIn[$i-1]);
						$U[$i]  = (6 * $U[$i] / ($XIn[$i+1] - $XIn[$i-1]) - $Sig * $U[$i-1]) / $p;
					}

					$qn = 0;
					$un = 0;
					$Yt[$Index] = ($un - $qn * $U[$Index-1]) / ($qn * $Yt[$Index-1] + 1);

					for($k=$Index-1;$k>=1;$k--)
						$Yt[$k] = $Yt[$k] * $Yt[$k+1] + $U[$k];

					$XPos  = $this->GArea_X1 + $this->GAreaXOffset;
					for($X=1;$X<=$Index;$X=$X+$Accuracy)
					{
						$klo = 1;
						$khi = $Index;
						$k   = $khi - $klo;
						while($k > 1)
						{
							$k = $khi - $klo;
							If ( $XIn[$k] >= $X )
								$khi = $k;
							else
								$klo = $k;
						}
						$klo = $khi - 1;

						$h     = $XIn[$khi] - $XIn[$klo];
						$a     = ($XIn[$khi] - $X) / $h;
						$b     = ($X - $XIn[$klo]) / $h;
						$Value = $a * $YIn[$klo] + $b * $YIn[$khi] + (($a*$a*$a - $a) * $Yt[$klo] + ($b*$b*$b - $b) * $Yt[$khi]) * ($h*$h) / 6;

						$YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

						if ( $XLast != -1 && !isset($Missing[floor($X)]) && !isset($Missing[floor($X+1)]) )
							$this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE);

						$XLast = $XPos;
						$YLast = $YPos;
						$XPos  = $XPos + $this->DivisionWidth * $Accuracy;
					}

					// Add potentialy missing values
					$XPos  = $XPos - $this->DivisionWidth * $Accuracy;
					if ( $XPos < ($this->GArea_X2 - $this->GAreaXOffset) )
					{
						$YPos = $this->GArea_Y2 - (($YIn[$Index]-$this->VMin) * $this->DivisionRatio);
						$this->drawLine($XLast,$YLast,$this->GArea_X2-$this->GAreaXOffset,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE);
					}

					$GraphID++;
				}
			}
		}

		/* This function draw a filled cubic curve */
		function drawFilledCubicCurve($Data,$DataDescription,$Accuracy=.1,$Alpha=100,$AroundZero=FALSE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawFilledCubicCurve",$DataDescription);
			$this->validateData("drawFilledCubicCurve",$Data);

			$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
			$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;
			$YZero = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
			if ( $YZero > $LayerHeight ) { $YZero = $LayerHeight; }

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$XIn = ""; $Yin = ""; $Yt = ""; $U = "";
				$XIn[0] = 0; $YIn[0] = 0;

				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$Index = 1;
				$XLast = -1; $Missing = "";
				foreach ( $Data as $Key => $Values )
				{
					$Value = $Data[$Key][$ColName];
					$XIn[$Index] = $Index;
					$YIn[$Index] = $Value;
					if ( !is_numeric($Value) ) { $Missing[$Index] = TRUE; }
					$Index++;
				}
				$Index--;

				$Yt[0] = 0;
				$Yt[1] = 0;
				$U[1]  = 0;
				for($i=2;$i<=$Index-1;$i++)
				{
					$Sig    = ($XIn[$i] - $XIn[$i-1]) / ($XIn[$i+1] - $XIn[$i-1]);
					$p      = $Sig * $Yt[$i-1] + 2;
					$Yt[$i] = ($Sig - 1) / $p;
					$U[$i]  = ($YIn[$i+1] - $YIn[$i]) / ($XIn[$i+1] - $XIn[$i]) - ($YIn[$i] - $YIn[$i-1]) / ($XIn[$i] - $XIn[$i-1]);
					$U[$i]  = (6 * $U[$i] / ($XIn[$i+1] - $XIn[$i-1]) - $Sig * $U[$i-1]) / $p;
				}

				$qn = 0;
				$un = 0;
				$Yt[$Index] = ($un - $qn * $U[$Index-1]) / ($qn * $Yt[$Index-1] + 1);

				for($k=$Index-1;$k>=1;$k--)
					$Yt[$k] = $Yt[$k] * $Yt[$k+1] + $U[$k];

				$Points   = "";
				$Points[] = $this->GAreaXOffset;
				$Points[] = $LayerHeight;

				$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
				$C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
				imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
				imagecolortransparent($this->Layers[0],$C_White);

				$YLast = NULL;
				$XPos  = $this->GAreaXOffset; $PointsCount = 2;
				for($X=1;$X<=$Index;$X=$X+$Accuracy)
				{
					$klo = 1;
					$khi = $Index;
					$k   = $khi - $klo;
					while($k > 1)
					{
						$k = $khi - $klo;
						If ( $XIn[$k] >= $X )
							$khi = $k;
						else
							$klo = $k;
					}
					$klo = $khi - 1;

					$h     = $XIn[$khi] - $XIn[$klo];
					$a     = ($XIn[$khi] - $X) / $h;
					$b     = ($X - $XIn[$klo]) / $h;
					$Value = $a * $YIn[$klo] + $b * $YIn[$khi] + (($a*$a*$a - $a) * $Yt[$klo] + ($b*$b*$b - $b) * $Yt[$khi]) * ($h*$h) / 6;

					$YPos = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

					if ( $YLast != NULL && $AroundZero && !isset($Missing[floor($X)]) && !isset($Missing[floor($X+1)]))
					{
						$aPoints   = "";
						$aPoints[] = $XLast;
						$aPoints[] = $YLast;
						$aPoints[] = $XPos;
						$aPoints[] = $YPos;
						$aPoints[] = $XPos;
						$aPoints[] = $YZero;
						$aPoints[] = $XLast;
						$aPoints[] = $YZero;

						$C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
						imagefilledpolygon($this->Layers[0],$aPoints,4,$C_Graph);
					}

					if ( !isset($Missing[floor($X)]) || $YLast == NULL )
					{
						$PointsCount++;
						$Points[] = $XPos;
						$Points[] = $YPos;
					}
					else
					{
						$PointsCount++; $Points[] = $XLast; $Points[] = $LayerHeight;
					}

					$YLast = $YPos; $XLast = $XPos; 
					$XPos  = $XPos + $this->DivisionWidth * $Accuracy;
				}

				// Add potentialy missing values
				$XPos  = $XPos - $this->DivisionWidth * $Accuracy;
				if ( $XPos < ($LayerWidth-$this->GAreaXOffset) )
				{
					$YPos = $LayerHeight - (($YIn[$Index]-$this->VMin) * $this->DivisionRatio);

					if ( $YLast != NULL && $AroundZero )
					{
						$aPoints   = "";
						$aPoints[] = $XLast;
						$aPoints[] = $YLast;
						$aPoints[] = $LayerWidth-$this->GAreaXOffset;
						$aPoints[] = $YPos;
						$aPoints[] = $LayerWidth-$this->GAreaXOffset;
						$aPoints[] = $YZero;
						$aPoints[] = $XLast;
						$aPoints[] = $YZero;

						$C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
						imagefilledpolygon($this->Layers[0],$aPoints,4,$C_Graph);
					}

					if ( $YIn[$klo] != "" && $YIn[$khi] != "" || $YLast == NULL )
					{
						$PointsCount++;
						$Points[] = $LayerWidth-$this->GAreaXOffset;
						$Points[] = $YPos;
					}
				}

				$Points[] = $LayerWidth-$this->GAreaXOffset;
				$Points[] = $LayerHeight;

				if ( !$AroundZero )
				{
					$C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
					imagefilledpolygon($this->Layers[0],$Points,$PointsCount,$C_Graph);
				}

				imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
				imagedestroy($this->Layers[0]);

				$this->drawCubicCurve($Data,$DataDescription,$Accuracy,$ColName);

				$GraphID++;
			}
		}

		/* This function draw a filled line graph */
		function drawFilledLineGraph($Data,$DataDescription,$Alpha=100,$AroundZero=FALSE)
		{
			$Empty = -2147483647;

			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawFilledLineGraph",$DataDescription);
			$this->validateData("drawFilledLineGraph",$Data);

			$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
			$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$aPoints   = "";
				$aPoints[] = $this->GAreaXOffset;
				$aPoints[] = $LayerHeight;

				$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
				$C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
				imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
				imagecolortransparent($this->Layers[0],$C_White);

				$XPos  = $this->GAreaXOffset;
				$XLast = -1; $PointsCount = 2;
				$YZero = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
				if ( $YZero > $LayerHeight ) { $YZero = $LayerHeight; }

				$YLast = $Empty;
				foreach ( $Data as $Key => $Values )
				{
					$Value = $Data[$Key][$ColName];
					$YPos = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

					/* Save point into the image map if option activated */
					if ( $this->BuildMap )
						$this->addToImageMap($XPos-3,$YPos-3,$XPos+3,$YPos+3,$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"FLine");

					if ( !is_numeric($Value) )
					{
						$PointsCount++;
						$aPoints[] = $XLast;
						$aPoints[] = $LayerHeight;

						$YLast = $Empty;
					}
					else
					{
						$PointsCount++;
						if ( $YLast <> $Empty )
						{ $aPoints[] = $XPos; $aPoints[] = $YPos; }
						else
						{ $PointsCount++; $aPoints[] = $XPos; $aPoints[] = $LayerHeight; $aPoints[] = $XPos; $aPoints[] = $YPos; }

						if ($YLast <> $Empty && $AroundZero)
						{
							$Points   = "";
							$Points[] = $XLast; $Points[] = $YLast;
							$Points[] = $XPos;
							$Points[] = $YPos;
							$Points[] = $XPos;
							$Points[] = $YZero;
							$Points[] = $XLast;
							$Points[] = $YZero;

							$C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
							imagefilledpolygon($this->Layers[0],$Points,4,$C_Graph);
						}
						$YLast = $YPos;
					}

					$XLast = $XPos;
					$XPos  = $XPos + $this->DivisionWidth;
				}
				$aPoints[] = $LayerWidth - $this->GAreaXOffset;
				$aPoints[] = $LayerHeight;

				if ( $AroundZero == FALSE )
				{
					$C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
					imagefilledpolygon($this->Layers[0],$aPoints,$PointsCount,$C_Graph);
				}

				imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
				imagedestroy($this->Layers[0]);
				$GraphID++;
				$this->drawLineGraph($Data,$DataDescription,$ColName);
			}
		}

		/* This function draw a bar graph */
		function drawOverlayBarGraph($Data,$DataDescription,$Alpha=50)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawOverlayBarGraph",$DataDescription);
			$this->validateData("drawOverlayBarGraph",$Data);

			$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
			$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$this->Layers[$GraphID] = imagecreatetruecolor($LayerWidth,$LayerHeight);
				$C_White                = $this->AllocateColor($this->Layers[$GraphID],255,255,255);
				$C_Graph                = $this->AllocateColor($this->Layers[$GraphID],$this->Palette[$GraphID]["R"],$this->Palette[$GraphID]["G"],$this->Palette[$GraphID]["B"]);
				imagefilledrectangle($this->Layers[$GraphID],0,0,$LayerWidth,$LayerHeight,$C_White);
				imagecolortransparent($this->Layers[$GraphID],$C_White);

				$XWidth = $this->DivisionWidth / 4;
				$XPos   = $this->GAreaXOffset;
				$YZero  = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
				$XLast  = -1; $PointsCount = 2;
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$ColName]) )
					{
						$Value = $Data[$Key][$ColName];
						if ( is_numeric($Value) )
						{
							$YPos  = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

							imagefilledrectangle($this->Layers[$GraphID],$XPos-$XWidth,$YPos,$XPos+$XWidth,$YZero,$C_Graph);

							$X1 = floor($XPos - $XWidth + $this->GArea_X1); $Y1 = floor($YPos+$this->GArea_Y1) + .2;
							$X2 = floor($XPos + $XWidth + $this->GArea_X1); $Y2 = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
							if ( $X1 <= $this->GArea_X1 ) { $X1 = $this->GArea_X1 + 1; }
							if ( $X2 >= $this->GArea_X2 ) { $X2 = $this->GArea_X2 - 1; }

							/* Save point into the image map if option activated */
							if ( $this->BuildMap )
								$this->addToImageMap($X1,min($Y1,$Y2),$X2,max($Y1,$Y2),$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"oBar");

							$this->drawLine($X1,$Y1,$X2,$Y1,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE);
						}
					}
					$XPos = $XPos + $this->DivisionWidth;
				}

				$GraphID++;
			}

			for($i=0;$i<=($GraphID-1);$i++)
			{
				imagecopymerge($this->Picture,$this->Layers[$i],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
				imagedestroy($this->Layers[$i]);
			}
		}

		/* This function draw a bar graph */
		function drawBarGraph($Data,$DataDescription,$Shadow=FALSE,$Alpha=100)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawBarGraph",$DataDescription);
			$this->validateData("drawBarGraph",$Data);

			$GraphID      = 0;
			$Series       = count($DataDescription["Values"]);
			$SeriesWidth  = $this->DivisionWidth / ($Series+1);
			$SerieXOffset = $this->DivisionWidth / 2 - $SeriesWidth / 2;

			$YZero  = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
			if ( $YZero > $this->GArea_Y2 ) { $YZero = $this->GArea_Y2; }

			$SerieID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$XPos  = $this->GArea_X1 + $this->GAreaXOffset - $SerieXOffset + $SeriesWidth * $SerieID;
				$XLast = -1;
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$ColName]))
					{
						if ( is_numeric($Data[$Key][$ColName]) )
						{
							$Value = $Data[$Key][$ColName];
							$YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

							/* Save point into the image map if option activated */
							if ( $this->BuildMap )
							{
								$this->addToImageMap($XPos+1,min($YZero,$YPos),$XPos+$SeriesWidth-1,max($YZero,$YPos),$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"Bar");
							}

							if ( $Shadow && $Alpha == 100 )
								$this->drawRectangle($XPos+1,$YZero,$XPos+$SeriesWidth-1,$YPos,25,25,25,TRUE,$Alpha);

							$this->drawFilledRectangle($XPos+1,$YZero,$XPos+$SeriesWidth-1,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE,$Alpha);
						}
					}
					$XPos = $XPos + $this->DivisionWidth;
				}
				$SerieID++;
			}
		}

		/* This function draw a stacked bar graph */
		function drawStackedBarGraph($Data,$DataDescription,$Alpha=50,$Contiguous=FALSE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawBarGraph",$DataDescription);
			$this->validateData("drawBarGraph",$Data);

			$GraphID      = 0;
			$Series       = count($DataDescription["Values"]);
			if ( $Contiguous )
				$SeriesWidth  = $this->DivisionWidth;
			else
				$SeriesWidth  = $this->DivisionWidth * .8;

			$YZero  = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
			if ( $YZero > $this->GArea_Y2 ) { $YZero = $this->GArea_Y2; }

			$SerieID = 0; $LastValue = "";
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$XPos  = $this->GArea_X1 + $this->GAreaXOffset - $SeriesWidth / 2;
				$XLast = -1; 
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$ColName]))
					{
						if ( is_numeric($Data[$Key][$ColName]) )
						{
							$Value = $Data[$Key][$ColName];

							if ( isset($LastValue[$Key]) )
							{
								$YPos    = $this->GArea_Y2 - ((($Value+$LastValue[$Key])-$this->VMin) * $this->DivisionRatio);
								$YBottom = $this->GArea_Y2 - (($LastValue[$Key]-$this->VMin) * $this->DivisionRatio);
								$LastValue[$Key] += $Value;
							}
							else
							{
								$YPos    = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);
								$YBottom = $YZero;
								$LastValue[$Key] = $Value;
							}

							/* Save point into the image map if option activated */
							if ( $this->BuildMap )
								$this->addToImageMap($XPos+1,min($YBottom,$YPos),$XPos+$SeriesWidth-1,max($YBottom,$YPos),$DataDescription["Description"][$ColName],$Data[$Key][$ColName].$DataDescription["Unit"]["Y"],"sBar");

							$this->drawFilledRectangle($XPos+1,$YBottom,$XPos+$SeriesWidth-1,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"],TRUE,$Alpha);
						}
					}
					$XPos = $XPos + $this->DivisionWidth;
				}
				$SerieID++;
			}
		}

		/* This function draw a limits bar graphs */
		function drawLimitsGraph($Data,$DataDescription,$R=0,$G=0,$B=0)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawLimitsGraph",$DataDescription);
			$this->validateData("drawLimitsGraph",$Data);

			$XWidth = $this->DivisionWidth / 4;
			$XPos   = $this->GArea_X1 + $this->GAreaXOffset;

			foreach ( $Data as $Key => $Values )
			{
				$Min     = $Data[$Key][$DataDescription["Values"][0]];
				$Max     = $Data[$Key][$DataDescription["Values"][0]];
				$GraphID = 0; $MaxID = 0; $MinID = 0;
				foreach ( $DataDescription["Values"] as $Key2 => $ColName )
				{
					if ( isset($Data[$Key][$ColName]) )
					{
						if ( $Data[$Key][$ColName] > $Max && is_numeric($Data[$Key][$ColName]))
						{ $Max = $Data[$Key][$ColName]; $MaxID = $GraphID; }
					}
					if ( isset($Data[$Key][$ColName]) && is_numeric($Data[$Key][$ColName]))
					{
						if ( $Data[$Key][$ColName] < $Min )
						{ $Min = $Data[$Key][$ColName]; $MinID = $GraphID; }
						$GraphID++;
					}
				}

				$YPos = $this->GArea_Y2 - (($Max-$this->VMin) * $this->DivisionRatio);
				$X1 = floor($XPos - $XWidth); $Y1 = floor($YPos) - .2;
				$X2 = floor($XPos + $XWidth);
				if ( $X1 <= $this->GArea_X1 ) { $X1 = $this->GArea_X1 + 1; }
				if ( $X2 >= $this->GArea_X2 ) { $X2 = $this->GArea_X2 - 1; }

				$YPos = $this->GArea_Y2 - (($Min-$this->VMin) * $this->DivisionRatio);
				$Y2 = floor($YPos) + .2;

				$this->drawLine(floor($XPos)-.2,$Y1+1,floor($XPos)-.2,$Y2-1,$R,$G,$B,TRUE);
				$this->drawLine(floor($XPos)+.2,$Y1+1,floor($XPos)+.2,$Y2-1,$R,$G,$B,TRUE);
				$this->drawLine($X1,$Y1,$X2,$Y1,$this->Palette[$MaxID]["R"],$this->Palette[$MaxID]["G"],$this->Palette[$MaxID]["B"],FALSE);
				$this->drawLine($X1,$Y2,$X2,$Y2,$this->Palette[$MinID]["R"],$this->Palette[$MinID]["G"],$this->Palette[$MinID]["B"],FALSE);

				$XPos = $XPos + $this->DivisionWidth;
			}
		}

		/* This function draw radar axis centered on the graph area */
		function drawRadarAxis($Data,$DataDescription,$Mosaic=TRUE,$BorderOffset=10,$A_R=60,$A_G=60,$A_B=60,$S_R=200,$S_G=200,$S_B=200,$MaxValue=-1)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawRadarAxis",$DataDescription);
			$this->validateData("drawRadarAxis",$Data);

			$C_TextColor = $this->AllocateColor($this->Picture,$A_R,$A_G,$A_B);

			/* Draw radar axis */
			$Points  = count($Data);
			$Radius  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
			$XCenter = ( $this->GArea_X2 - $this->GArea_X1 ) / 2 + $this->GArea_X1;
			$YCenter = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 + $this->GArea_Y1;

			/* Search for the max value */
			if ( $MaxValue == -1 )
			{
				foreach ( $DataDescription["Values"] as $Key2 => $ColName )
				{
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
							if ( $Data[$Key][$ColName] > $MaxValue ) { $MaxValue = $Data[$Key][$ColName]; }
					}
				}
			}

			/* Draw the mosaic */
			if ( $Mosaic )
			{
				$RadiusScale = $Radius / $MaxValue;
				for ( $t=1; $t<=$MaxValue-1; $t++)
				{
					$TRadius  = $RadiusScale * $t;
					$LastX1   = -1;

					for ( $i=0; $i<=$Points; $i++)
					{
						$Angle = -90 + $i * 360/$Points;
						$X1 = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
						$Y1 = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;
						$X2 = cos($Angle * 3.1418 / 180 ) * ($TRadius+$RadiusScale) + $XCenter;
						$Y2 = sin($Angle * 3.1418 / 180 ) * ($TRadius+$RadiusScale) + $YCenter;

						if ( $t % 2 == 1 && $LastX1 != -1)
						{
							$Plots   = "";
							$Plots[] = $X1; $Plots[] = $Y1;
							$Plots[] = $X2; $Plots[] = $Y2;
							$Plots[] = $LastX2; $Plots[] = $LastY2;
							$Plots[] = $LastX1; $Plots[] = $LastY1;

							$C_Graph = $this->AllocateColor($this->Picture,250,250,250);
							imagefilledpolygon($this->Picture,$Plots,(count($Plots)+1)/2,$C_Graph);
						}

						$LastX1 = $X1; $LastY1= $Y1;
						$LastX2 = $X2; $LastY2= $Y2;
					}
				}
			}


			/* Draw the spider web */
			for ( $t=1; $t<=$MaxValue; $t++)
			{
				$TRadius = ( $Radius / $MaxValue ) * $t;
				$LastX   = -1;

				for ( $i=0; $i<=$Points; $i++)
				{
					$Angle = -90 + $i * 360/$Points;
					$X = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
					$Y = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;

					if ( $LastX != -1 )
						$this->drawDottedLine($LastX,$LastY,$X,$Y,4,$S_R,$S_G,$S_B);

					$LastX = $X; $LastY= $Y;
				}
			}

			/* Draw the axis */
			for ( $i=0; $i<=$Points; $i++)
			{
				$Angle = -90 + $i * 360/$Points;
				$X = cos($Angle * 3.1418 / 180 ) * $Radius + $XCenter;
				$Y = sin($Angle * 3.1418 / 180 ) * $Radius + $YCenter;

				$this->drawLine($XCenter,$YCenter,$X,$Y,$A_R,$A_G,$A_B);

				$XOffset = 0; $YOffset = 0;
				if (isset($Data[$i][$DataDescription["Position"]]))
				{
					$Label = $Data[$i][$DataDescription["Position"]];

					$Positions = imagettfbbox($this->FontSize,0,$this->FontName,$Label);
					$Width  = $Positions[2] - $Positions[6];
					$Height = $Positions[3] - $Positions[7];

					if ( $Angle >= 0 && $Angle <= 90 )
						$YOffset = $Height;

					if ( $Angle > 90 && $Angle <= 180 )
					{ $YOffset = $Height; $XOffset = -$Width; }

					if ( $Angle > 180 && $Angle <= 270 )
					{ $XOffset = -$Width; }

					imagettftext($this->Picture,$this->FontSize,0,$X+$XOffset,$Y+$YOffset,$C_TextColor,$this->FontName,$Label);
				}
			}

			/* Write the values */
			for ( $t=1; $t<=$MaxValue; $t++)
			{
				$TRadius = ( $Radius / $MaxValue ) * $t;

				$Angle = -90 + 360 / $Points;
				$X1 = $XCenter;
				$Y1 = $YCenter - $TRadius;
				$X2 = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
				$Y2 = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;

				$XPos = floor(($X2-$X1)/2) + $X1;
				$YPos = floor(($Y2-$Y1)/2) + $Y1;

				$Positions = imagettfbbox($this->FontSize,0,$this->FontName,$t);
				$X = $XPos - ( $X+$Positions[2] - $X+$Positions[6] ) / 2;
				$Y = $YPos + $this->FontSize;

				$this->drawFilledRoundedRectangle($X+$Positions[6]-2,$Y+$Positions[7]-1,$X+$Positions[2]+4,$Y+$Positions[3]+1,2,240,240,240);
				$this->drawRoundedRectangle($X+$Positions[6]-2,$Y+$Positions[7]-1,$X+$Positions[2]+4,$Y+$Positions[3]+1,2,220,220,220);
				imagettftext($this->Picture,$this->FontSize,0,$X,$Y,$C_TextColor,$this->FontName,$t);
			}
		}

		/* This function draw a radar graph centered on the graph area */
		function drawRadar($Data,$DataDescription,$BorderOffset=10,$MaxValue=-1)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawRadar",$DataDescription);
			$this->validateData("drawRadar",$Data);

			$Points  = count($Data);
			$Radius  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
			$XCenter = ( $this->GArea_X2 - $this->GArea_X1 ) / 2 + $this->GArea_X1;
			$YCenter = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 + $this->GArea_Y1;

			/* Search for the max value */
			if ( $MaxValue == -1 )
			{
				foreach ( $DataDescription["Values"] as $Key2 => $ColName )
				{
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
							if ( $Data[$Key][$ColName] > $MaxValue ) { $MaxValue = $Data[$Key][$ColName]; }
					}
				}
			}

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$Angle = -90;
				$XLast = -1;
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$ColName]))
					{
						$Value    = $Data[$Key][$ColName];
						$Strength = ( $Radius / $MaxValue ) * $Value;

						$XPos = cos($Angle * 3.1418 / 180 ) * $Strength + $XCenter;
						$YPos = sin($Angle * 3.1418 / 180 ) * $Strength + $YCenter;

						if ( $XLast != -1 )
							$this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);

						if ( $XLast == -1 )
						{ $FirstX = $XPos; $FirstY = $YPos; }

						$Angle = $Angle + (360/$Points);
						$XLast = $XPos;
						$YLast = $YPos;
					}
				}
				$this->drawLine($XPos,$YPos,$FirstX,$FirstY,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
				$GraphID++;
			}
		}

		/* This function draw a radar graph centered on the graph area */
		function drawFilledRadar($Data,$DataDescription,$Alpha=50,$BorderOffset=10,$MaxValue=-1)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawFilledRadar",$DataDescription);
			$this->validateData("drawFilledRadar",$Data);

			$Points      = count($Data);
			$LayerWidth  = $this->GArea_X2-$this->GArea_X1;
			$LayerHeight = $this->GArea_Y2-$this->GArea_Y1;
			$Radius      = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
			$XCenter     = ( $this->GArea_X2 - $this->GArea_X1 ) / 2;
			$YCenter     = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2;

			/* Search for the max value */
			if ( $MaxValue == -1 )
			{
				foreach ( $DataDescription["Values"] as $Key2 => $ColName )
				{
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
							if ( $Data[$Key][$ColName] > $MaxValue && is_numeric($Data[$Key][$ColName])) { $MaxValue = $Data[$Key][$ColName]; }
					}
				}
			}

			$GraphID = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				$ID = 0;
				foreach ( $DataDescription["Description"] as $keyI => $ValueI )
				{ if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

				$Angle = -90;
				$XLast = -1;
				$Plots = "";
				foreach ( $Data as $Key => $Values )
				{
					if ( isset($Data[$Key][$ColName]))
					{
						$Value    = $Data[$Key][$ColName];
						if ( !is_numeric($Value) ) { $Value = 0; }
						$Strength = ( $Radius / $MaxValue ) * $Value;

						$XPos = cos($Angle * 3.1418 / 180 ) * $Strength + $XCenter;
						$YPos = sin($Angle * 3.1418 / 180 ) * $Strength + $YCenter;

						$Plots[] = $XPos;
						$Plots[] = $YPos;

						$Angle = $Angle + (360/$Points);
						$XLast = $XPos;
						$YLast = $YPos;
					}
				}

				if (isset($Plots[0]))
				{
					$Plots[] = $Plots[0];
					$Plots[] = $Plots[1];

					$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
					$C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
					imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
					imagecolortransparent($this->Layers[0],$C_White);

					$C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
					imagefilledpolygon($this->Layers[0],$Plots,(count($Plots)+1)/2,$C_Graph);

					imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
					imagedestroy($this->Layers[0]);

					for($i=0;$i<=count($Plots)-4;$i=$i+2)
						$this->drawLine($Plots[$i]+$this->GArea_X1,$Plots[$i+1]+$this->GArea_Y1,$Plots[$i+2]+$this->GArea_X1,$Plots[$i+3]+$this->GArea_Y1,$this->Palette[$ColorID]["R"],$this->Palette[$ColorID]["G"],$this->Palette[$ColorID]["B"]);
				}

				$GraphID++;
			}
		}

		/* This function draw a flat pie chart */
		function drawBasicPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$R=255,$G=255,$B=255,$Decimals=0)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawBasicPieGraph",$DataDescription,FALSE);
			$this->validateData("drawBasicPieGraph",$Data);

			/* Determine pie sum */
			$Series = 0; $PieSum = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				if ( $ColName != $DataDescription["Position"] )
				{
					$Series++;
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
							$PieSum = $PieSum + $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription["Position"]];
					}
				}
			}

			/* Validate serie */
			if ( $Series != 1 )
				RaiseFatal("Pie chart can only accept one serie of data.");

			$SpliceRatio         = 360 / $PieSum;
			$SplicePercent       = 100 / $PieSum;

			/* Calculate all polygons */
			$Angle    = 0; $TopPlots = "";
			foreach($iValues as $Key => $Value)
			{
				$TopPlots[$Key][] = $XPos;
				$TopPlots[$Key][] = $YPos;

				/* Process labels position & size */
				$Caption = "";
				if ( !($DrawLabels == PIE_NOLABEL) )
				{
					$TAngle   = $Angle+($Value*$SpliceRatio/2);
					if ($DrawLabels == PIE_PERCENTAGE)
						$Caption  = (round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";
					elseif ($DrawLabels == PIE_LABELS)
						$Caption  = $iLabels[$Key];
					elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
						$Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";
					elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
						$Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";

					$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
					$TextWidth  = $Position[2]-$Position[0];
					$TextHeight = abs($Position[1])+abs($Position[3]);

					$TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius+10) + $XPos;

					if ( $TAngle > 0 && $TAngle < 180 )
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+10) + $YPos + 4;
					else
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+4) + $YPos - ($TextHeight/2);

					if ( $TAngle > 90 && $TAngle < 270 )
						$TX = $TX - $TextWidth;

					$C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
					imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
				}

				/* Process pie slices */
				for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
				{
					$TopX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos;
					$TopY = sin($iAngle * 3.1418 / 180 ) * $Radius + $YPos;

					$TopPlots[$Key][] = $TopX; 
					$TopPlots[$Key][] = $TopY;
				}

				$TopPlots[$Key][] = $XPos;
				$TopPlots[$Key][] = $YPos;

				$Angle = $iAngle;
			}
			$PolyPlots = $TopPlots;

			/* Set array values type to float --- PHP Bug with imagefilledpolygon casting to integer */
			foreach ($TopPlots as $Key => $Value)
			{ foreach ($TopPlots[$Key] as $Key2 => $Value2) { settype($TopPlots[$Key][$Key2],"float"); } }

			/* Draw Top polygons */
			foreach ($PolyPlots as $Key => $Value)
			{ 
				$C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]["R"],$this->Palette[$Key]["G"],$this->Palette[$Key]["B"]);
				imagefilledpolygon($this->Picture,$PolyPlots[$Key],(count($PolyPlots[$Key])+1)/2,$C_GraphLo);
			}

			$this->drawCircle($XPos-.5,$YPos-.5,$Radius,$R,$G,$B);
			$this->drawCircle($XPos-.5,$YPos-.5,$Radius+.5,$R,$G,$B);

			/* Draw Top polygons */
			foreach ($TopPlots as $Key => $Value)
			{ 
				for($j=0;$j<=count($TopPlots[$Key])-4;$j=$j+2)
					$this->drawLine($TopPlots[$Key][$j],$TopPlots[$Key][$j+1],$TopPlots[$Key][$j+2],$TopPlots[$Key][$j+3],$R,$G,$B);
			}
		}

		function drawFlatPieGraphWithShadow($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals=0)
		{
			$this->drawFlatPieGraph($Data,$DataDescription,$XPos+$this->ShadowXDistance,$YPos+$this->ShadowYDistance,$Radius,PIE_NOLABEL,$SpliceDistance,$Decimals,TRUE);
			$this->drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius,$DrawLabels,$SpliceDistance,$Decimals,FALSE);
		}

		/* This function draw a flat pie chart */
		function drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals=0,$AllBlack=FALSE)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawFlatPieGraph",$DataDescription,FALSE);
			$this->validateData("drawFlatPieGraph",$Data);

			$ShadowStatus = $this->ShadowActive ; $this->ShadowActive = FALSE;

			/* Determine pie sum */
			$Series = 0; $PieSum = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				if ( $ColName != $DataDescription["Position"] )
				{
					$Series++;
					foreach ( $Data as $Key => $Values )
					{
						if ( isset($Data[$Key][$ColName]))
							$PieSum = $PieSum + $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription["Position"]];
					}
				}
			}

			/* Validate serie */
			if ( $Series != 1 )
			{
				RaiseFatal("Pie chart can only accept one serie of data.");
				return(0);
			}

			$SpliceRatio   = 360 / $PieSum;
			$SplicePercent = 100 / $PieSum;

			/* Calculate all polygons */
			$Angle = 0; $TopPlots = "";
			foreach($iValues as $Key => $Value)
			{
				$XOffset = cos(($Angle+($Value/2*$SpliceRatio)) * 3.1418 / 180 ) * $SpliceDistance;
				$YOffset = sin(($Angle+($Value/2*$SpliceRatio)) * 3.1418 / 180 ) * $SpliceDistance;

				$TopPlots[$Key][] = round($XPos + $XOffset);
				$TopPlots[$Key][] = round($YPos + $YOffset);

				if ( $AllBlack )
				{ $Rc = $this->ShadowRColor; $Gc = $this->ShadowGColor; $Bc = $this->ShadowBColor; }
				else
				{ $Rc = $this->Palette[$Key]["R"]; $Gc = $this->Palette[$Key]["G"]; $Bc = $this->Palette[$Key]["B"]; }

				$XLineLast = ""; $YLineLast = "";

				/* Process labels position & size */
				$Caption = "";
				if ( !($DrawLabels == PIE_NOLABEL) )
				{
					$TAngle   = $Angle+($Value*$SpliceRatio/2);
					if ($DrawLabels == PIE_PERCENTAGE)
						$Caption  = (round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";
					elseif ($DrawLabels == PIE_LABELS)
						$Caption  = $iLabels[$Key];
					elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
						$Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";
					elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
						$Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";

					$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
					$TextWidth  = $Position[2]-$Position[0];
					$TextHeight = abs($Position[1])+abs($Position[3]);

					$TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius+10+$SpliceDistance) + $XPos;

					if ( $TAngle > 0 && $TAngle < 180 )
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+10+$SpliceDistance) + $YPos + 4;
					else
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+$SpliceDistance+4) + $YPos - ($TextHeight/2);

					if ( $TAngle > 90 && $TAngle < 270 )
						$TX = $TX - $TextWidth;

					$C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
					imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
				}

				/* Process pie slices */
				if ( !$AllBlack )
					$LineColor = $this->AllocateColor($this->Picture,$Rc,$Gc,$Bc);
				else
					$LineColor = $this->AllocateColor($this->Picture,$Rc,$Gc,$Bc);

				$XLineLast = ""; $YLineLast = "";
				for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
				{
					$PosX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos + $XOffset;
					$PosY = sin($iAngle * 3.1418 / 180 ) * $Radius + $YPos + $YOffset;

					$TopPlots[$Key][] = round($PosX); $TopPlots[$Key][] = round($PosY);

					if ( $iAngle == $Angle || $iAngle == $Angle+$Value*$SpliceRatio || $iAngle +.5 > $Angle+$Value*$SpliceRatio)
						$this->drawLine($XPos+$XOffset,$YPos+$YOffset,$PosX,$PosY,$Rc,$Gc,$Bc);

					if ( $XLineLast != "" )
						$this->drawLine($XLineLast,$YLineLast,$PosX,$PosY,$Rc,$Gc,$Bc);

					$XLineLast = $PosX; $YLineLast = $PosY;
				}

				$TopPlots[$Key][] = round($XPos + $XOffset);  $TopPlots[$Key][] = round($YPos + $YOffset);

				$Angle = $iAngle;
			}
			$PolyPlots = $TopPlots;

			/* Draw Top polygons */
			foreach ($PolyPlots as $Key => $Value)
			{ 
				if ( !$AllBlack )
					$C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]["R"],$this->Palette[$Key]["G"],$this->Palette[$Key]["B"]);
				else
					$C_GraphLo = $this->AllocateColor($this->Picture,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor);

				imagefilledpolygon($this->Picture,$PolyPlots[$Key],(count($PolyPlots[$Key])+1)/2,$C_GraphLo);
			}
			$this->ShadowActive = $ShadowStatus;
		}

		/* This function draw a pseudo-3D pie chart */
		function drawPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$EnhanceColors=TRUE,$Skew=60,$SpliceHeight=20,$SpliceDistance=0,$Decimals=0)
		{
			/* Validate the Data and DataDescription array */
			$this->validateDataDescription("drawPieGraph",$DataDescription,FALSE);
			$this->validateData("drawPieGraph",$Data);

			/* Determine pie sum */
			$Series = 0; $PieSum = 0; $rPieSum = 0;
			foreach ( $DataDescription["Values"] as $Key2 => $ColName )
			{
				if ( $ColName != $DataDescription["Position"] )
				{
					$Series++;
					foreach ( $Data as $Key => $Values )
						if ( isset($Data[$Key][$ColName]))
						{
							if ( $Data[$Key][$ColName] == 0 )
							{ $iValues[] = 0; $rValues[] = 0; $iLabels[] = $Data[$Key][$DataDescription["Position"]]; }
							// Removed : $PieSum++; $rValues[] = 1;
							else
							{ $PieSum += $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription["Position"]]; $rValues[] = $Data[$Key][$ColName]; $rPieSum += $Data[$Key][$ColName];}
						}
				}
			}

			/* Validate serie */
			if ( $Series != 1 )
				RaiseFatal("Pie chart can only accept one serie of data.");

			$SpliceDistanceRatio = $SpliceDistance;
			$SkewHeight          = ($Radius * $Skew) / 100;
			$SpliceRatio         = (360 - $SpliceDistanceRatio * count($iValues) ) / $PieSum;
			$SplicePercent       = 100 / $PieSum;
			$rSplicePercent      = 100 / $rPieSum;

			/* Calculate all polygons */
			$Angle    = 0; $CDev = 5;
			$TopPlots = ""; $BotPlots = "";
			$aTopPlots = ""; $aBotPlots = "";
			foreach($iValues as $Key => $Value)
			{
				$XCenterPos = cos(($Angle-$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $XPos;
				$YCenterPos = sin(($Angle-$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $YPos;
				$XCenterPos2 = cos(($Angle+$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $XPos;
				$YCenterPos2 = sin(($Angle+$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $YPos;

				$TopPlots[$Key][] = round($XCenterPos); $BotPlots[$Key][] = round($XCenterPos);
				$TopPlots[$Key][] = round($YCenterPos); $BotPlots[$Key][] = round($YCenterPos + $SpliceHeight);
				$aTopPlots[$Key][] = $XCenterPos; $aBotPlots[$Key][] = $XCenterPos;
				$aTopPlots[$Key][] = $YCenterPos; $aBotPlots[$Key][] = $YCenterPos + $SpliceHeight;

				/* Process labels position & size */
				$Caption = "";
				if ( !($DrawLabels == PIE_NOLABEL) )
				{
					$TAngle   = $Angle+($Value*$SpliceRatio/2);
					if ($DrawLabels == PIE_PERCENTAGE)
						$Caption  = (round($rValues[$Key] * pow(10,$Decimals) * $rSplicePercent)/pow(10,$Decimals))."%";
					elseif ($DrawLabels == PIE_LABELS)
						$Caption  = $iLabels[$Key];
					elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
						$Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals))."%";

					$Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
					$TextWidth  = $Position[2]-$Position[0];
					$TextHeight = abs($Position[1])+abs($Position[3]);

					$TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius + 10)+ $XPos;

					if ( $TAngle > 0 && $TAngle < 180 )
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($SkewHeight + 10) + $YPos + $SpliceHeight + 4;
					else
						$TY = sin(($TAngle) * 3.1418 / 180 ) * ($SkewHeight + 4) + $YPos - ($TextHeight/2);

					if ( $TAngle > 90 && $TAngle < 270 )
						$TX = $TX - $TextWidth;

					$C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
					imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
				}

				/* Process pie slices */
				for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
				{
					$TopX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos;
					$TopY = sin($iAngle * 3.1418 / 180 ) * $SkewHeight + $YPos;

					$TopPlots[$Key][] = round($TopX); $BotPlots[$Key][] = round($TopX);
					$TopPlots[$Key][] = round($TopY); $BotPlots[$Key][] = round($TopY + $SpliceHeight);
					$aTopPlots[$Key][] = $TopX; $aBotPlots[$Key][] = $TopX;
					$aTopPlots[$Key][] = $TopY; $aBotPlots[$Key][] = $TopY + $SpliceHeight;
				}

				$TopPlots[$Key][] = round($XCenterPos2); $BotPlots[$Key][] = round($XCenterPos2);
				$TopPlots[$Key][] = round($YCenterPos2); $BotPlots[$Key][] = round($YCenterPos2 + $SpliceHeight);
				$aTopPlots[$Key][] = $XCenterPos2; $aBotPlots[$Key][] = $XCenterPos2;
				$aTopPlots[$Key][] = $YCenterPos2; $aBotPlots[$Key][] = $YCenterPos2 + $SpliceHeight;

				$Angle = $iAngle + $SpliceDistanceRatio;
			}

			/* Draw Bottom polygons */
			foreach($iValues as $Key => $Value)
			{
				$C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]["R"],$this->Palette[$Key]["G"],$this->Palette[$Key]["B"],-20);
				imagefilledpolygon($this->Picture,$BotPlots[$Key],(count($BotPlots[$Key])+1)/2,$C_GraphLo);

				if ( $EnhanceColors ) { $En = -10; } else { $En = 0; }

				for($j=0;$j<=count($aBotPlots[$Key])-4;$j=$j+2)
					$this->drawLine($aBotPlots[$Key][$j],$aBotPlots[$Key][$j+1],$aBotPlots[$Key][$j+2],$aBotPlots[$Key][$j+3],$this->Palette[$Key]["R"]+$En,$this->Palette[$Key]["G"]+$En,$this->Palette[$Key]["B"]+$En);
			}

			/* Draw pie layers */
			if ( $EnhanceColors ) { $ColorRatio = 30 / $SpliceHeight; } else { $ColorRatio = 25 / $SpliceHeight; }
			for($i=$SpliceHeight-1;$i>=1;$i--)
			{
				foreach($iValues as $Key => $Value)
				{
					$C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]["R"],$this->Palette[$Key]["G"],$this->Palette[$Key]["B"],-10);
					$Plots = ""; $Plot = 0;
					foreach($TopPlots[$Key] as $Key2 => $Value2)
					{
						$Plot++;
						if ( $Plot % 2 == 1 )
							$Plots[] = $Value2;
						else
							$Plots[] = $Value2+$i;
					}
					imagefilledpolygon($this->Picture,$Plots,(count($Plots)+1)/2,$C_GraphLo);

					$Index       = count($Plots);
					if ($EnhanceColors ) {$ColorFactor = -20 + ($SpliceHeight - $i) * $ColorRatio; } else { $ColorFactor = 0; }

					$this->drawAntialiasPixel($Plots[0],$Plots[1],$this->Palette[$Key]["R"]+$ColorFactor,$this->Palette[$Key]["G"]+$ColorFactor,$this->Palette[$Key]["B"]+$ColorFactor);
					$this->drawAntialiasPixel($Plots[2],$Plots[3],$this->Palette[$Key]["R"]+$ColorFactor,$this->Palette[$Key]["G"]+$ColorFactor,$this->Palette[$Key]["B"]+$ColorFactor);
					$this->drawAntialiasPixel($Plots[$Index-4],$Plots[$Index-3],$this->Palette[$Key]["R"]+$ColorFactor,$this->Palette[$Key]["G"]+$ColorFactor,$this->Palette[$Key]["B"]+$ColorFactor);
				}
			}

			/* Draw Top polygons */
			for($Key=count($iValues)-1;$Key>=0;$Key--)
			{ 
				$C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]["R"],$this->Palette[$Key]["G"],$this->Palette[$Key]["B"]);
				imagefilledpolygon($this->Picture,$TopPlots[$Key],(count($TopPlots[$Key])+1)/2,$C_GraphLo);

				if ( $EnhanceColors ) { $En = 10; } else { $En = 0; }
				for($j=0;$j<=count($aTopPlots[$Key])-4;$j=$j+2)
					$this->drawLine($aTopPlots[$Key][$j],$aTopPlots[$Key][$j+1],$aTopPlots[$Key][$j+2],$aTopPlots[$Key][$j+3],$this->Palette[$Key]["R"]+$En,$this->Palette[$Key]["G"]+$En,$this->Palette[$Key]["B"]+$En);
			}
		}

		/* This function can be used to set the background color */
		function drawBackground($R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
			imagefilledrectangle($this->Picture,0,0,$this->XSize,$this->YSize,$C_Background);
		}

		/* This function can be used to set the background color */
		function drawGraphAreaGradient($R,$G,$B,$Decay,$Target=TARGET_GRAPHAREA)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			if ( $Target == TARGET_GRAPHAREA )  { $X1 = $this->GArea_X1+1; $X2 = $this->GArea_X2-1; $Y1 = $this->GArea_Y1+1; $Y2 = $this->GArea_Y2; }
			if ( $Target == TARGET_BACKGROUND ) { $X1 = 0; $X2 = $this->XSize; $Y1 = 0; $Y2 = $this->YSize; }

			/* Positive gradient */
			if ( $Decay > 0 )
			{
				$YStep = ($Y2 - $Y1 - 2) / $Decay;
				for($i=0;$i<=$Decay;$i++)
				{
					$R-=1;$G-=1;$B-=1;
					$Yi1 = $Y1 + ( $i * $YStep );
					$Yi2 = ceil( $Yi1 + ( $i * $YStep ) + $YStep );
					if ( $Yi2 >= $Yi2 ) { $Yi2 = $Y2-1; }

					$C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
					imagefilledrectangle($this->Picture,$X1,$Yi1,$X2,$Yi2,$C_Background);
				}
			}

			/* Negative gradient */
			if ( $Decay < 0 )
			{
				$YStep = ($Y2 - $Y1 - 2) / -$Decay;
				$Yi1   = $Y1; $Yi2   = $Y1+$YStep;
				for($i=-$Decay;$i>=0;$i--)
				{
					$R+=1;$G+=1;$B+=1;
					$C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
					imagefilledrectangle($this->Picture,$X1,$Yi1,$X2,$Yi2,$C_Background);

					$Yi1+= $YStep;
					$Yi2+= $YStep;
					if ( $Yi2 >= $Yi2 ) { $Yi2 = $Y2-1; }
				}
			}
		}

		/* This function create a rectangle with antialias */
		function drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

			$X1=$X1-.2;$Y1=$Y1-.2;
			$X2=$X2+.2;$Y2=$Y2+.2;
			$this->drawLine($X1,$Y1,$X2,$Y1,$R,$G,$B);
			$this->drawLine($X2,$Y1,$X2,$Y2,$R,$G,$B);
			$this->drawLine($X2,$Y2,$X1,$Y2,$R,$G,$B);
			$this->drawLine($X1,$Y2,$X1,$Y1,$R,$G,$B);
		}

		/* This function create a filled rectangle with antialias */
		function drawFilledRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B,$DrawBorder=TRUE,$Alpha=100,$NoFallBack=FALSE)
		{
			if ( $X2 < $X1 ) { list($X1, $X2) = array($X2, $X1); }
			if ( $Y2 < $Y1 ) { list($Y1, $Y2) = array($Y2, $Y1); }

			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			if ( $Alpha == 100 )
			{
				/* Process shadows */
				if ( $this->ShadowActive && !$NoFallBack )
				{
					$this->drawFilledRectangle($X1+$this->ShadowXDistance,$Y1+$this->ShadowYDistance,$X2+$this->ShadowXDistance,$Y2+$this->ShadowYDistance,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha,TRUE);
					if ( $this->ShadowBlur != 0 )
					{
						$AlphaDecay = ($this->ShadowAlpha / $this->ShadowBlur);

						for($i=1; $i<=$this->ShadowBlur; $i++)
							$this->drawFilledRectangle($X1+$this->ShadowXDistance-$i/2,$Y1+$this->ShadowYDistance-$i/2,$X2+$this->ShadowXDistance-$i/2,$Y2+$this->ShadowYDistance-$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
						for($i=1; $i<=$this->ShadowBlur; $i++)
							$this->drawFilledRectangle($X1+$this->ShadowXDistance+$i/2,$Y1+$this->ShadowYDistance+$i/2,$X2+$this->ShadowXDistance+$i/2,$Y2+$this->ShadowYDistance+$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
					}
				}

				$C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);
				imagefilledrectangle($this->Picture,round($X1),round($Y1),round($X2),round($Y2),$C_Rectangle);
			}
			else
			{
				$LayerWidth  = abs($X2-$X1)+2;
				$LayerHeight = abs($Y2-$Y1)+2;

				$this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
				$C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
				imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
				imagecolortransparent($this->Layers[0],$C_White);

				$C_Rectangle = $this->AllocateColor($this->Layers[0],$R,$G,$B);
				imagefilledrectangle($this->Layers[0],round(1),round(1),round($LayerWidth-1),round($LayerHeight-1),$C_Rectangle);

				imagecopymerge($this->Picture,$this->Layers[0],round(min($X1,$X2)-1),round(min($Y1,$Y2)-1),0,0,$LayerWidth,$LayerHeight,$Alpha);
				imagedestroy($this->Layers[0]);
			}

			if ( $DrawBorder )
			{
				$ShadowSettings = $this->ShadowActive; $this->ShadowActive = FALSE;
				$this->drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B);
				$this->ShadowActive = $ShadowSettings;
			}
		}

		/* This function create a rectangle with rounded corners and antialias */
		function drawRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

			$Step = 90 / ((3.1418 * $Radius)/2);

			for($i=0;$i<=90;$i=$i+$Step)
			{
				$X = cos(($i+180)*3.1418/180) * $Radius + $X1 + $Radius;
				$Y = sin(($i+180)*3.1418/180) * $Radius + $Y1 + $Radius;
				$this->drawAntialiasPixel($X,$Y,$R,$G,$B);

				$X = cos(($i-90)*3.1418/180) * $Radius + $X2 - $Radius;
				$Y = sin(($i-90)*3.1418/180) * $Radius + $Y1 + $Radius;
				$this->drawAntialiasPixel($X,$Y,$R,$G,$B);

				$X = cos(($i)*3.1418/180) * $Radius + $X2 - $Radius;
				$Y = sin(($i)*3.1418/180) * $Radius + $Y2 - $Radius;
				$this->drawAntialiasPixel($X,$Y,$R,$G,$B);

				$X = cos(($i+90)*3.1418/180) * $Radius + $X1 + $Radius;
				$Y = sin(($i+90)*3.1418/180) * $Radius + $Y2 - $Radius;
				$this->drawAntialiasPixel($X,$Y,$R,$G,$B);
			}

			$X1=$X1-.2;$Y1=$Y1-.2;
			$X2=$X2+.2;$Y2=$Y2+.2;
			$this->drawLine($X1+$Radius,$Y1,$X2-$Radius,$Y1,$R,$G,$B);
			$this->drawLine($X2,$Y1+$Radius,$X2,$Y2-$Radius,$R,$G,$B);
			$this->drawLine($X2-$Radius,$Y2,$X1+$Radius,$Y2,$R,$G,$B);
			$this->drawLine($X1,$Y2-$Radius,$X1,$Y1+$Radius,$R,$G,$B);
		}

		/* This function create a filled rectangle with rounded corners and antialias */
		function drawFilledRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

			$Step = 90 / ((3.1418 * $Radius)/2);

			for($i=0;$i<=90;$i=$i+$Step)
			{
				$Xi1 = cos(($i+180)*3.1418/180) * $Radius + $X1 + $Radius;
				$Yi1 = sin(($i+180)*3.1418/180) * $Radius + $Y1 + $Radius;

				$Xi2 = cos(($i-90)*3.1418/180) * $Radius + $X2 - $Radius;
				$Yi2 = sin(($i-90)*3.1418/180) * $Radius + $Y1 + $Radius;

				$Xi3 = cos(($i)*3.1418/180) * $Radius + $X2 - $Radius;
				$Yi3 = sin(($i)*3.1418/180) * $Radius + $Y2 - $Radius;

				$Xi4 = cos(($i+90)*3.1418/180) * $Radius + $X1 + $Radius;
				$Yi4 = sin(($i+90)*3.1418/180) * $Radius + $Y2 - $Radius;

				imageline($this->Picture,$Xi1,$Yi1,$X1+$Radius,$Yi1,$C_Rectangle);
				imageline($this->Picture,$X2-$Radius,$Yi2,$Xi2,$Yi2,$C_Rectangle);
				imageline($this->Picture,$X2-$Radius,$Yi3,$Xi3,$Yi3,$C_Rectangle);
				imageline($this->Picture,$Xi4,$Yi4,$X1+$Radius,$Yi4,$C_Rectangle);

				$this->drawAntialiasPixel($Xi1,$Yi1,$R,$G,$B);
				$this->drawAntialiasPixel($Xi2,$Yi2,$R,$G,$B);
				$this->drawAntialiasPixel($Xi3,$Yi3,$R,$G,$B);
				$this->drawAntialiasPixel($Xi4,$Yi4,$R,$G,$B);
			}

			imagefilledrectangle($this->Picture,$X1,$Y1+$Radius,$X2,$Y2-$Radius,$C_Rectangle);
			imagefilledrectangle($this->Picture,$X1+$Radius,$Y1,$X2-$Radius,$Y2,$C_Rectangle);

			$X1=$X1-.2;$Y1=$Y1-.2;
			$X2=$X2+.2;$Y2=$Y2+.2;
			$this->drawLine($X1+$Radius,$Y1,$X2-$Radius,$Y1,$R,$G,$B);
			$this->drawLine($X2,$Y1+$Radius,$X2,$Y2-$Radius,$R,$G,$B);
			$this->drawLine($X2-$Radius,$Y2,$X1+$Radius,$Y2,$R,$G,$B);
			$this->drawLine($X1,$Y2-$Radius,$X1,$Y1+$Radius,$R,$G,$B);
		}

		/* This function create a circle with antialias */
		function drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
		{
			if ( $Width == 0 ) { $Width = $Height; }
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Circle = $this->AllocateColor($this->Picture,$R,$G,$B);
			$Step     = 360 / (2 * 3.1418 * max($Width,$Height));

			for($i=0;$i<=360;$i=$i+$Step)
			{
				$X = cos($i*3.1418/180) * $Height + $Xc;
				$Y = sin($i*3.1418/180) * $Width + $Yc;
				$this->drawAntialiasPixel($X,$Y,$R,$G,$B);
			}
		}

		/* This function create a filled circle/ellipse with antialias */
		function drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
		{
			if ( $Width == 0 ) { $Width = $Height; }
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$C_Circle = $this->AllocateColor($this->Picture,$R,$G,$B);
			$Step     = 360 / (2 * 3.1418 * max($Width,$Height));

			for($i=90;$i<=270;$i=$i+$Step)
			{
				$X1 = cos($i*3.1418/180) * $Height + $Xc;
				$Y1 = sin($i*3.1418/180) * $Width + $Yc;
				$X2 = cos((180-$i)*3.1418/180) * $Height + $Xc;
				$Y2 = sin((180-$i)*3.1418/180) * $Width + $Yc;

				$this->drawAntialiasPixel($X1-1,$Y1-1,$R,$G,$B);
				$this->drawAntialiasPixel($X2-1,$Y2-1,$R,$G,$B);

				if ( ($Y1-1) > $Yc - max($Width,$Height) )
					imageline($this->Picture,$X1,$Y1-1,$X2-1,$Y2-1,$C_Circle);
			}
		}

		/* This function will draw a filled ellipse */
		function drawEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
		{ $this->drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width); }

		/* This function will draw an ellipse */
		function drawFilledEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
		{ $this->drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width); }

		/* This function create a line with antialias */
		function drawLine($X1,$Y1,$X2,$Y2,$R,$G,$B,$GraphFunction=FALSE)
		{
			if ( $this->LineDotSize > 1 ) { $this->drawDottedLine($X1,$Y1,$X2,$Y2,$this->LineDotSize,$R,$G,$B,$GraphFunction); return(0); }
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$Distance = sqrt(($X2-$X1)*($X2-$X1)+($Y2-$Y1)*($Y2-$Y1));  
			if ( $Distance == 0 )
				return(-1);
			$XStep = ($X2-$X1) / $Distance;
			$YStep = ($Y2-$Y1) / $Distance;

			for($i=0;$i<=$Distance;$i++)
			{
				$X = $i * $XStep + $X1;
				$Y = $i * $YStep + $Y1;

				if ( ($X >= $this->GArea_X1 && $X <= $this->GArea_X2 && $Y >= $this->GArea_Y1 && $Y <= $this->GArea_Y2) || !$GraphFunction )
				{
					if ( $this->LineWidth == 1 )
						$this->drawAntialiasPixel($X,$Y,$R,$G,$B);
					else
					{
						$StartOffset = -($this->LineWidth/2); $EndOffset = ($this->LineWidth/2);
						for($j=$StartOffset;$j<=$EndOffset;$j++)
							$this->drawAntialiasPixel($X+$j,$Y+$j,$R,$G,$B);
					}
				}
			}
		}

		/* This function create a line with antialias */
		function drawDottedLine($X1,$Y1,$X2,$Y2,$DotSize,$R,$G,$B,$GraphFunction=FALSE)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$Distance = sqrt(($X2-$X1)*($X2-$X1)+($Y2-$Y1)*($Y2-$Y1));  

			$XStep = ($X2-$X1) / $Distance;
			$YStep = ($Y2-$Y1) / $Distance;

			$DotIndex = 0;
			for($i=0;$i<=$Distance;$i++)
			{
				$X = $i * $XStep + $X1;
				$Y = $i * $YStep + $Y1;

				if ( $DotIndex <= $DotSize)
				{
					if ( ($X >= $this->GArea_X1 && $X <= $this->GArea_X2 && $Y >= $this->GArea_Y1 && $Y <= $this->GArea_Y2) || !$GraphFunction )
					{
						if ( $this->LineWidth == 1 )
							$this->drawAntialiasPixel($X,$Y,$R,$G,$B);
						else
						{
							$StartOffset = -($this->LineWidth/2); $EndOffset = ($this->LineWidth/2);
							for($j=$StartOffset;$j<=$EndOffset;$j++)
								$this->drawAntialiasPixel($X+$j,$Y+$j,$R,$G,$B);
						}
					}
				}

				$DotIndex++;
				if ( $DotIndex == $DotSize * 2 )
					$DotIndex = 0;        
			}
		}

		/* Load a PNG file and draw it over the chart */
		function drawFromPNG($FileName,$X,$Y,$Alpha=100)
		{ $this->drawFromPicture(1,$FileName,$X,$Y,$Alpha); }

		/* Load a GIF file and draw it over the chart */
		function drawFromGIF($FileName,$X,$Y,$Alpha=100)
		{ $this->drawFromPicture(2,$FileName,$X,$Y,$Alpha); }

		/* Load a JPEG file and draw it over the chart */
		function drawFromJPG($FileName,$X,$Y,$Alpha=100)
		{ $this->drawFromPicture(3,$FileName,$X,$Y,$Alpha); }

		/* Generic loader function for external pictures */
		function drawFromPicture($PicType,$FileName,$X,$Y,$Alpha=100)
		{
			if ( file_exists($FileName))
			{
				$Infos  = getimagesize($FileName);
				$Width  = $Infos[0];
				$Height = $Infos[1];
				if ( $PicType == 1 ) { $Raster = imagecreatefrompng($FileName); }
				if ( $PicType == 2 ) { $Raster = imagecreatefromgif($FileName); }
				if ( $PicType == 3 ) { $Raster = imagecreatefromjpeg($FileName); }

				imagecopymerge($this->Picture,$Raster,$X,$Y,0,0,$Width,$Height,$Alpha);
				imagedestroy($Raster);
			}
		}

		/* Draw an alpha pixel */
		function drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B)
		{
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			if ( $X < 0 || $Y < 0 || $X >= $this->XSize || $Y >= $this->YSize )
				return(-1);

			$RGB2 = imagecolorat($this->Picture, $X, $Y);
			$R2   = ($RGB2 >> 16) & 0xFF;
			$G2   = ($RGB2 >> 8) & 0xFF;
			$B2   = $RGB2 & 0xFF;

			$iAlpha = (100 - $Alpha)/100;
			$Alpha  = $Alpha / 100;

			$Ra   = floor($R*$Alpha+$R2*$iAlpha);
			$Ga   = floor($G*$Alpha+$G2*$iAlpha);
			$Ba   = floor($B*$Alpha+$B2*$iAlpha);

			$C_Aliased = $this->AllocateColor($this->Picture,$Ra,$Ga,$Ba);
			imagesetpixel($this->Picture,$X,$Y,$C_Aliased);
		}

		/* Color helper */
		function AllocateColor($Picture,$R,$G,$B,$Factor=0)
		{
			$R = $R + $Factor;
			$G = $G + $Factor;
			$B = $B + $Factor;
			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			return(imagecolorallocate($Picture,$R,$G,$B));
		}

		/* Add a border to the picture */
		function addBorder($Size=3,$R=0,$G=0,$B=0)
		{
			$Width  = $this->XSize+2*$Size;
			$Height = $this->YSize+2*$Size;

			$Resampled    = imagecreatetruecolor($Width,$Height);
			$C_Background = $this->AllocateColor($Resampled,$R,$G,$B);
			imagefilledrectangle($Resampled,0,0,$Width,$Height,$C_Background);

			imagecopy($Resampled,$this->Picture,$Size,$Size,0,0,$this->XSize,$this->YSize);
			imagedestroy($this->Picture);

			$this->XSize = $Width;
			$this->YSize = $Height;

			$this->Picture = imagecreatetruecolor($this->XSize,$this->YSize);
			$C_White = $this->AllocateColor($this->Picture,255,255,255);
			imagefilledrectangle($this->Picture,0,0,$this->XSize,$this->YSize,$C_White);
			imagecolortransparent($this->Picture,$C_White);
			imagecopy($this->Picture,$Resampled,0,0,0,0,$this->XSize,$this->YSize);
		}

		/* Render the current picture to a file */
		function Render($FileName)
		{
			if ( $this->ErrorReporting )
				$this->printErrors($this->ErrorInterface);

			/* Save image map if requested */
			if ( $this->BuildMap )
				$this->SaveImageMap();

			imagepng($this->Picture,$FileName);
		}

		/* Render the current picture to STDOUT */
		function Stroke()
		{
			if ( $this->ErrorReporting )
				$this->printErrors("GD");

			/* Save image map if requested */
			if ( $this->BuildMap )
				$this->SaveImageMap();

			header('Content-type: image/png');
			imagepng($this->Picture);
		}

		/* Private functions for internal processing */
		function drawAntialiasPixel($X,$Y,$R,$G,$B,$Alpha=100,$NoFallBack=FALSE)
		{
			/* Process shadows */
			if ( $this->ShadowActive && !$NoFallBack )
			{
				$this->drawAntialiasPixel($X+$this->ShadowXDistance,$Y+$this->ShadowYDistance,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha,TRUE);
				if ( $this->ShadowBlur != 0 )
				{
					$AlphaDecay = ($this->ShadowAlpha / $this->ShadowBlur);

					for($i=1; $i<=$this->ShadowBlur; $i++)
						$this->drawAntialiasPixel($X+$this->ShadowXDistance-$i/2,$Y+$this->ShadowYDistance-$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
					for($i=1; $i<=$this->ShadowBlur; $i++)
						$this->drawAntialiasPixel($X+$this->ShadowXDistance+$i/2,$Y+$this->ShadowYDistance+$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
				}
			}

			if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
			if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
			if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

			$Plot = "";
			$Xi   = floor($X);
			$Yi   = floor($Y);

			if ( $Xi == $X && $Yi == $Y)
			{
				if ( $Alpha == 100 )
				{
					$C_Aliased = $this->AllocateColor($this->Picture,$R,$G,$B);
					imagesetpixel($this->Picture,$X,$Y,$C_Aliased);
				}
				else
					$this->drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B);
			}
			else
			{
				$Alpha1 = (((1 - ($X - floor($X))) * (1 - ($Y - floor($Y))) * 100) / 100) * $Alpha;
				if ( $Alpha1 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi,$Yi,$Alpha1,$R,$G,$B); }

				$Alpha2 = ((($X - floor($X)) * (1 - ($Y - floor($Y))) * 100) / 100) * $Alpha;
				if ( $Alpha2 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi+1,$Yi,$Alpha2,$R,$G,$B); }

				$Alpha3 = (((1 - ($X - floor($X))) * ($Y - floor($Y)) * 100) / 100) * $Alpha;
				if ( $Alpha3 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi,$Yi+1,$Alpha3,$R,$G,$B); }

				$Alpha4 = ((($X - floor($X)) * ($Y - floor($Y)) * 100) / 100) * $Alpha;
				if ( $Alpha4 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi+1,$Yi+1,$Alpha4,$R,$G,$B); }
			}
		}

		/* Validate data contained in the description array */
		function validateDataDescription($FunctionName,&$DataDescription,$DescriptionRequired=TRUE)
		{
			if (!isset($DataDescription["Position"]))
			{
				$this->Errors[] = "[Warning] ".$FunctionName." - Y Labels are not set.";
				$DataDescription["Position"] = "Name";
			}

			if ( $DescriptionRequired )
			{
				if (!isset($DataDescription["Description"]))
				{
					$this->Errors[] = "[Warning] ".$FunctionName." - Series descriptions are not set.";
					foreach($DataDescription["Values"] as $key => $Value)
					{
						$DataDescription["Description"][$Value] = $Value;
					}
				}

				if (count($DataDescription["Description"]) < count($DataDescription["Values"]))
				{
					$this->Errors[] = "[Warning] ".$FunctionName." - Some series descriptions are not set.";
					foreach($DataDescription["Values"] as $key => $Value)
					{
						if ( !isset($DataDescription["Description"][$Value]))
							$DataDescription["Description"][$Value] = $Value;
					}
				}
			}
		}

		/* Validate data contained in the data array */
		function validateData($FunctionName,&$Data)
		{
			$DataSummary = array();

			foreach($Data as $key => $Values)
			{
				foreach($Values as $key2 => $Value)
				{
					if (!isset($DataSummary[$key2]))
						$DataSummary[$key2] = 1;
					else
						$DataSummary[$key2]++;
				}
			}

			if ( max($DataSummary) == 0 )
				$this->Errors[] = "[Warning] ".$FunctionName." - No data set.";

			foreach($DataSummary as $key => $Value)
			{
				if ($Value < max($DataSummary))
				{
					$this->Errors[] = "[Warning] ".$FunctionName." - Missing data in serie ".$key.".";
				}
			}
		}

		/* Print all error messages on the CLI or graphically */
		function printErrors($Mode="CLI")
		{
			if (count($this->Errors) == 0)
				return(0);

			if ( $Mode == "CLI" )
			{
				foreach($this->Errors as $key => $Value)
					echo $Value."\r\n";
			}
			elseif ( $Mode == "GD" )
			{
				$this->setLineStyle($Width=1);
				$MaxWidth = 0;
				foreach($this->Errors as $key => $Value)
				{
					$Position  = imageftbbox($this->ErrorFontSize,0,$this->ErrorFontName,$Value);
					$TextWidth = $Position[2]-$Position[0];
					if ( $TextWidth > $MaxWidth ) { $MaxWidth = $TextWidth; }
				}
				$this->drawFilledRoundedRectangle($this->XSize-($MaxWidth+20),$this->YSize-(20+(($this->ErrorFontSize+4)*count($this->Errors))),$this->XSize-10,$this->YSize-10,6,233,185,185);
				$this->drawRoundedRectangle($this->XSize-($MaxWidth+20),$this->YSize-(20+(($this->ErrorFontSize+4)*count($this->Errors))),$this->XSize-10,$this->YSize-10,6,193,145,145);

				$C_TextColor = $this->AllocateColor($this->Picture,133,85,85);
				$YPos        = $this->YSize - (18 + (count($this->Errors)-1) * ($this->ErrorFontSize + 4));
				foreach($this->Errors as $key => $Value)
				{
					imagettftext($this->Picture,$this->ErrorFontSize,0,$this->XSize-($MaxWidth+15),$YPos,$C_TextColor,$this->ErrorFontName,$Value);
					$YPos = $YPos + ($this->ErrorFontSize + 4);
				}
			}
		}

		/* Activate the image map creation process */
		function setImageMap($Mode=TRUE,$GraphID="MyGraph")
		{
			$this->BuildMap = $Mode;
			$this->MapID    = $GraphID;
		}

		/* Add a box into the image map */
		function addToImageMap($X1,$Y1,$X2,$Y2,$SerieName,$Value,$CallerFunction)
		{
			if ( $this->MapFunction == NULL || $this->MapFunction == $CallerFunction )
			{
				$this->ImageMap[]  = round($X1).",".round($Y1).",".round($X2).",".round($Y2).",".$SerieName.",".$Value;
				$this->MapFunction = $CallerFunction;
			}
		}

		/* Load and cleanup the image map from disk */
		function getImageMap($MapName,$Flush=TRUE)
		{
			/* Strip HTML query strings */
			$Values   = $this->tmpFolder.$MapName;
			$Value    = split("\?",$Values);
			$FileName = $Value[0];

			if ( file_exists($FileName) )
			{
				$Handle     = fopen($FileName, "r");
				$MapContent = fread($Handle, filesize($FileName));
				fclose($Handle);
				echo $MapContent;

				if ( $Flush )
					unlink($FileName);

				exit();
			}
			else
			{
				header("HTTP/1.0 404 Not Found");
				exit();
			}
		}

		/* Save the image map to the disk */
		function SaveImageMap()
		{
			if ( !$this->BuildMap ) { return(-1); }

			if ( $this->ImageMap == NULL )
			{
				$this->Errors[] = "[Warning] SaveImageMap - Image map is empty.";
				return(-1);
			}

			$Handle = fopen($this->tmpFolder.$this->MapID, 'w');
			if ( !$Handle )
			{
				$this->Errors[] = "[Warning] SaveImageMap - Cannot save the image map.";
				return(-1);
			}
			else
			{
				foreach($this->ImageMap as $Key => $Value)
					fwrite($Handle, htmlentities($Value)."\r");
			}
			fclose ($Handle);
		}

		/* Convert seconds to a time format string */
		function ToTime($Value)
		{
			$Hour   = floor($Value/3600);
			$Minute = floor(($Value - $Hour*3600)/60);
			$Second = floor($Value - $Hour*3600 - $Minute*60);

			if (strlen($Hour) == 1 )   { $Hour = "0".$Hour; }
			if (strlen($Minute) == 1 ) { $Minute = "0".$Minute; }
			if (strlen($Second) == 1 ) { $Second = "0".$Second; }

			return($Hour.":".$Minute.":".$Second);
		}

		/* Convert to metric system */
		function ToMetric($Value)
		{
			$Go = floor($Value/1000000000);
			$Mo = floor(($Value - $Go*1000000000)/1000000);
			$Ko = floor(($Value - $Go*1000000000 - $Mo*1000000)/1000);
			$o  = floor($Value - $Go*1000000000 - $Mo*1000000 - $Ko*1000);

			if ($Go != 0)   { return($Go.".".$Mo."g"); }
			if ($Mo != 0)   { return($Mo.".".$ko."m"); }
			if ($Ko != 0)   { return($Ko.".".$o)."k"; }
			return($o);
		}

		/* Convert to curency */
		function ToCurrency($Value)
		{
			$Go = floor($Value/1000000000);
			$Mo = floor(($Value - $Go*1000000000)/1000000);
			$Ko = floor(($Value - $Go*1000000000 - $Mo*1000000)/1000);
			$o  = floor($Value - $Go*1000000000 - $Mo*1000000 - $Ko*1000);

			if ( strlen($o) == 1 ) { $o = "00".$o; }
			if ( strlen($o) == 2 ) { $o = "0".$o; }

			$ResultString = $o;
			if ( $Ko != 0 ) { $ResultString = $Ko.".".$ResultString; }
			if ( $Mo != 0 ) { $ResultString = $Mo.".".$ResultString; }
			if ( $Go != 0 ) { $ResultString = $Go.".".$ResultString; }

			$ResultString = $this->Currency.$ResultString;
			return($ResultString);
		}

		/* Set date format for axis labels */
		function setDateFormat($Format)
		{
			$this->DateFormat = $Format;
		}

		/* Convert TS to a date format string */
		function ToDate($Value)
		{
			return(date($this->DateFormat,$Value));
		}

		/* Check if a number is a full integer (for scaling) */
		function isRealInt($Value)
		{
			if ($Value == floor($Value))
				return(TRUE);
			return(FALSE);
		}
	}

	function RaiseFatal($Message)
	{
		echo "[FATAL] ".$Message."\r\n";
		exit();
	}
?>